Voting No.
There is no way to reliably and accurately check for bots. Any measures taken can be quickly and easily avoided, for example checking for tokens would be bypassed by having users pay a fee monthly and send an message encrypted so that only the bot service can read it.

And so you know Captia will NOT stop bots in any meaningful way.

In short there is nothing that can be done to prevent bots without a fundamental change in how the game operates. The focus should be on how to make sure that no account can drain significantly more than they spend.