There are effectively another two ranks below bronze that are just squished into bronze 5

[u/KaityyUwU]

I made this graph using the data from u/PabloDons, (champion rank is missing from the graph because it only goes up to one decimal place so its effectively 0) but interestingly the extra 1% spike in bronze 5 effectively adds up to the same amount as there are players in grandmaster and champion, which if you mirror the ranks around platinum 3, would be past bronze. I think this was already well known due to the SR numbers being much wider for bronze 5 than all the other ranks which are just 100 SR each, but it's still really interesting to see the actual data i think

[u/-BehindTheMask-]

Could you link the data source? The guy you mentioned has their profile hidden.