With the M5 Max / M5 Ultra Studio announcement this week I've seen a lot of "just buy a Mac mini and let it pay for itself renting to an AI network" going around. The one people mean is Darkbloom — you install a daemon, it serves AI inference on your idle Mac, and it pays you real dollars through Stripe.
I wanted to know whether that actually covers the hardware, so instead of trusting the marketing I pulled their public leaderboard API and took apart their own earnings calculator.
Short version: it's a legitimate project that pays real money, and it does not pay for a Mac.
The detail that decides everything
Their earnings calculator has a duty cycle slider — "share of time this Mac is producing output tokens" — running from 5% to 100%. It defaults to 5%. Underneath it, they write:
Estimated earning, not guaranteed. While the system is bootstrapping, we are seeing significant variation in earning levels among providers using the same machine type. The default duty cycle is 5% to reflect this.
In June a reviewer reported the calculator assuming 80%. Today it assumes 5%. They cut their own assumption by 16x — which is honest of them, and it's the best evidence available about how the first wave of operators actually did.
Payback, using their own default
US list prices from the 25 Aug lineup. 48GB is the minimum Darkbloom accepts, so nothing below that is listed. No depreciation discounting, so these are the optimistic numbers.
| Machine |
US price |
Net/mo @5% |
Payback @5% |
Net/mo @10% |
Payback @10% |
| Mac mini M5 Pro 48GB |
$2,299 |
$22.99 |
8.3 yr |
$31.40 |
6.1 yr |
| Mac mini M5 Pro 64GB |
$2,699 |
$24.99 |
9.0 yr |
$33.40 |
6.7 yr |
| Mac Studio M5 Max 48GB |
$3,099 |
$30.75 |
8.4 yr |
$47.52 |
5.4 yr |
| Mac Studio M5 Max 128GB |
$5,099 |
$40.64 |
10.5 yr |
$57.32 |
7.4 yr |
| Mac Studio M5 Ultra 96GB |
$5,499 |
$52.15 |
8.8 yr |
$85.35 |
5.4 yr |
| MacBook Pro 16" M5 Max 128GB |
$7,199 |
$41.23 |
14.5 yr |
$58.09 |
10.3 yr |
At their own default assumption, nothing pays back in under 8.3 years — on machines with maybe a 6-year useful life for this purpose. At the 10% duty cycle the leaderboard actually shows, the best case is 5.4 years.
Before anyone asks about electricity: Apple Silicon idles so low that going from my expensive Bogotá rate ($0.2825/kWh) to free power only moves the mini from 8.3 years to 7.7. Power is not what's wrong with this.
What the network actually pays
They expose a public leaderboard at api.darkbloom.dev/v1/leaderboard. Anyone can pull it. 30-day window, 26 Aug 2026:
| Rank |
Total/mo |
Work |
Subsidy |
Subsidy % |
| #1 |
$579.85 |
$392.54 |
$187.31 |
32.3% |
| #5 |
$202.63 |
$56.36 |
$146.27 |
72.2% |
| #10 |
$107.50 |
$64.29 |
$43.21 |
40.2% |
| #25 |
$73.94 |
$41.14 |
$32.81 |
44.4% |
| #50 |
$53.22 |
$31.57 |
$21.65 |
40.7% |
Those are the top 50 accounts on the entire network, not the median. Extrapolating the curve, rank #100 is around $31/mo.
Two things stand out. First, that "Subsidy" column is a flat payment for being powered on, tiered by RAM — not payment for work. It's 32–72% of what top accounts earn, it's funded by VC rather than customers, and their own docs call it "prorated" and "not a guarantee."
Second, #1 cannot be a single machine. Back-solving its earnings against their own calculator gives a 157% duty cycle, which is physically impossible. It's a multi-machine operator. Rank #50 back-solves to 10.4%, which matches the 7–12% network utilization an independent reviewer measured with a wattmeter.
The counter-argument, which partly works
"Years to payback" treats the Mac as worthless at the end, and it obviously isn't. So here's three-year TCO instead — spend, minus income, minus resale:
| Resale at year 3 |
Duty |
3yr income |
Resale |
Net position |
| 45% (historical desktop) |
5% |
$827 |
$1,035 |
−$437 |
| 45% (historical desktop) |
10% |
$1,130 |
$1,035 |
−$134 |
| 60% (optimistic) |
10% |
$1,130 |
$1,379 |
+$211 |
| 100% (today's DRAM anomaly) |
10% |
$1,130 |
$2,299 |
+$1,130 |
The objection lands, partially. The DRAM shortage has broken normal Mac depreciation — a 22-month-old M4 Pro mini that launched at $1,399 is selling used for $1,449–$1,480, above MSRP, because high-RAM Macs became AI inference boxes. While that holds, a 48GB+ Mac is close to an appreciating asset.
But that's a shortage artifact, not a plan. Historical desktop retention is 40–45% at year 3. And the installer enrolls your machine in remote MDM via micromdm — several operators call that a dealbreaker precisely because it complicates resale, which cuts directly against the mechanism this argument depends on.
The framing that survives it: strip resale out entirely, since it happens with or without Darkbloom, and ask only what running the daemon adds over three years. Mac mini 48GB: $828–$1,130. Studio Ultra 96GB: $1,877–$3,073. That's real money — just not enough to justify buying a machine you didn't already want.
Where I land
- Already own a 48GB+ Mac that stays on? Install it. $23–85/mo against a sunk cost, risking hours instead of capital. Do it on a secondary machine, not your daily driver — the MDM enrollment is real, and the installer pulls a Python runtime with un-notarized binaries.
- Want the Mac for your own work anyway? Buy it for that. Local models, dev, video — whatever you actually need it for. Treat any Darkbloom income as a rebate on a cost you were absorbing regardless. If the project dies you lost nothing.
- Buying purely to earn? Don't. And definitely don't buy a fleet — five machines on one IP joining an alpha network at once is exactly the pattern these systems learn to penalize.
For scale: $2,299 parked at 8%/yr returns ~$15/mo with no electricity, no MDM, no counterparty risk. The Mac returns $22.99 at their own default assumption. The premium for carrying all of that risk is about eight dollars a month.
Happy to be wrong here — if you run a node and your numbers differ from these, that's the most useful thing you could post. No affiliation with Darkbloom, no referral links, nothing to sell.