People be like "You can't expect game devs to actually work on their games when they're paid a full wage!"
Although he is not paid a full wage. I think, from memory, he said he was UK based. If so you can take his £2160 dollars a month he gets on Subscribestar and then
1) Remove their fees 8%
2) Subscribestar then automatically deducts VAT at 20%
3) Less National Insurance and tax depends but average for low income is around 20%
4) Convert to UK pounds, roughly 20% at the current time
Should see him take home about £900 a month. A nice little earner in the back pocket, but not really enough to call a full time wage to live off.