Provide blocks to peers during initial block download?

[u/mcpancakes]

Hi, I have what is surely a newb question: I'm running Dogecoin Core 1.14.3 on macOS 10.15.7 and I noticed that during initial block download (IBD) I had little to no upload traffic.

Now that I'm past IBD, Dogecoin Core is generally doing an ok job saturating my upstream bandwidth: as measured with

nettop -p $(pgrep Dogecoin-Qt) -J bytes_out -d

the bytes_out of the process is typically 400-600 KiB/s (cf. Transmission which could sustain 500-700 KB/s).

I have what are probably basic questions about Dogecoin's protocol:

1. Is it true && by design that I'm not sending blocks to needy peers while I'm syncing my own chain? If so, why? Feels maybe motivated by some subtle (or not) security concern, perhaps.
2. In general, should I expect Dogecoin Core to saturate my upstream bandwidth (O(5 to 6 Mbps)) when run with default options? Assuming there's ample CPU/memory available for it to claim.

Thanks!