I find the whole paying for a Google+ invite thing ridiculous so I'll give them away.
Just PM me your email and I'll send you one when I can. The registration/invite system is unreliable at times but you're not paying for it so who cares.
This is FREE but as always, voluntary donations would be appreciated. 1E7io7P9eYsQZndv6Fd2j7t7SdTGj48gRa
As long as they are clear on how it works and the risks involved
And most are. It's up to the end-user to understand the game. But to be fair, I have see two of these 'games' change the rules after receiving deposits.