You know there's a theoretical loophole.  Ichio only indexes free porn games now. Ichio has a donation option.  And visa and Mastercard are only going after adult content at the moment.  A few non-free not porn games and donations as a studio is a option I mean you don't need to do anything as extensive as heram in another world.  Or at least not exploring the world pre-the old king after all it had to have been vastly different. Shrug point is a side project or two would also help you in a few ways I hate to suggest that option do to it spreading resources but yeah you could also do a few doujins on some other sites to gain some income too. 

Also would like to see some more things from jongs orginal world.  It may be fanon but I don't think it was as normal as  portrayed I mean isekai and books appearing should be suspicious but its just kinda accepted.