That's not really a lot of money. Going forward, it looks like he might average $20k/month, at best. If he wanted to hire another developer, for example, he really couldn't afford it. Sure, it's nice for now, but it's not a long-term business.
I think it is good info for indies, at least they now know that they need to start alone at the beginning.
It depends on how much time he spends on this on a daily basis. I am guessing its only a few hours a week now. If you take that view then I think numbers are very good.
This saved time will allow him to do other things and spawn off other interesting projects which is pretty cool imo.