Similar service like estago?

I need a service like Estago where people can pay with a tweet or with Facebook, because I have technical issue with the pay with Facebook option.

Does any one know a similar service?

Thanks a lot guys.

Estago changed their whole system and started charging $10 a month to continue ...

This ruined alot of my viral sites, but here's another free alternative :

Estago doesn't seem to be working anymore. I paid $10 and it won't even post to Twitter or Facebook.

Hi, It's not true. It works again. Now they even added Google+ and there is still the free service. The Premium one for $10 gives you additional access to statistics, dashboard and information about people who paid for your products like links to their profiles on Facebook and Google+. But you still can create free buttons and I saw it is developing recently, new changes ever almost 1 week.