Yeah, I'm sure DPC is doing well for himself for an AVN author, but it's not like these guys have major publishers behind them. AVNs are not exactly mainstream. He probably makes enough to quit his day job, reinvest into his work and live comfortably, which is exceptionally rare for an AVN dev to be able to do. But I doubt he'll be buying yachts or exclusive beachfront properties anytime soon.
Yes, the AVN genre is unfortunately, like sex in video games, a taboo for the gaming industry. Very few developers allow themselves to show adult content, and then it will be light erotica. The gaming press is also bypassing this genre (but I think this is for the best, looking at what gaming journalism has become). Not one publisher will take on AVN, so the developers do everything alone, or in a small team.
And they are definitely not millionaires, do not forget that the patreon takes interest, plus taxes, plus the cost of buying music, computer hardware, electricity, and many more models in DAZ 3D are paid.
As with any business, net income is not as big as operating income.
Maybe he wants to be an millionaire himself but is lack of any useful skills? So he is envious cause someone made it by himself.
Ha ha, that's right.