A guy named Railai started this selling thing and he thought that he can make people greed like him, glad that people are getting an invites, not only that they are getting help from people who wants to connect their wallet o VPS thanks to Andrew Idena and Rioda for all the help, we can make this a great and fair community, one account per miner.
This is sad. I agree with a collateral being used so the ones who gets invited is more committed to make the validation/s but selling the invites I do not agree with.
I also understand the frustration when someone waste your invite and you don't get nothing, and even I do not agree with selling the invites (because this is not ethical) I can understand the move and I don't judge.
The good thing is that this community is awesome and you can find a lot of really nice guys, so getting a free invite is quite easy and you don't have to pay for it, for now.