Credit to tqrnsdls . Seems still open to doing a little studio work in addition to Fantia
Also, they're month locked. If you sub for this month you get March's content only. if you want previous month's content you have to then buy previous months after subscribing for the current month. And if you're an idiot you'll cancel your subscription the wrong way (there are 2 ways) before the month ends so it doesn't auto-renew and lose this month's history too (a scam imo). (Yes I am said idiot but I don't speak Japanese in fairness)