Costly, yes, but when it's about the free credits gifted by WGT for tiering up (50 cr each for Amateur went to the entry fee) it's only fair to leave them 120 when collecting 480.
There may have been another tourney for the Pro's 100 crs and others for the credits regained for the "invite-your-friends" entry gifts.
Some of the inactive participants have interesting ways to tier up - an Amateur with only two ranked games, a Pro without any ranked game as an Amateur...
And a guy who put "hanging with the Cheez boys" to his profile on day 1 of his existance but made friends with the gang only on day 2...
Alas, I think this came to an end in January (?when the gift cards were dropped?) so it's futile to carry on.