Hey there! Unfortunately, Steam doesn't want us on their platform in any form, and GOG has been ignoring us for a month now. But we'll try to get the game onto other stores. Sorry about the inconvenience - does subscribing via SubscribeStar also not work well for you?
Every subscription has to be authorized by my bank internally, exceptions are Netflix, HBO, etc. I can't even buy Crunchroll itself. So SubscribeStar is out too :(