spin and go freeroll pokerstars

Which players are invited to this spin and go freerolls and why?. its just random? there arent lots of players and its very easy to win 1 dollar spin and go ticket, sometimes these tournaments were cancelled due to the fact that less than 100 people were registered.

Support says that the issuing of tickets for these freerolls is engaged in the marketing department, and for whatever reason, or for what services they choose players, support does not know. But if you do not have a ticket to these freerolls, then perhaps you do not have the right to play them.

I read you can get the tickets within PokerSchoolOnline. Since I haven't made any deposit to day I never engaged with that site.

It's unclear about this tournament, there is very little information about it on web.