MMO with account. The way I'm solving it with github is you add your github account name to your account in my game and github has a API to ask who is sponsoring you and for how much so I can verify everyone is paying.
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I'm planning on releasing some tools and I would like to be able to charge a monthly subscription amount for this. There are other sites (github f.ex.) that can do this, but I don't want to put all eggs in one basket.
Is this something feasible to add in the future? I know it entails additional complexity (storing encrypted billing information, controlling the date billed, etc.)