I honestly think the sink was perfectly fine.
This may do a few things to prices however.

1. It may lower the USD/TC rate you'd get from buying TC from other users, however it may not be affected if certain sellers decided not to go full retard and lose all their TC.

2. This may actually lower the price of items for a little bit as people will try to quick sell their items in order to get TC back. This may lead into people with loads of items stocked, or just a few extra items into selling their items to people for a lower price than normal, and possibly giving the buyer some profit in the long run.

Either way, the TC sink was a win-win situation.