Would it be possible for you to code a Beta 3 of the API, but with this one including the credits thing so users can get paid for voting? I would like this ;3
It always has included a thing for credits, you just had to customize it to your CMS. Why not you code it? If you were -- I suggest to make edits of the API for popular systems like Phoenix and the upcoming Snowlight.
Of course it would be safe. Each vote has one API "token", and once that token is successfully validated the first time, it is removed from our database (or set from 1 to 0).