Important Note Regarding Grandfathered Bids : In addition, our current minimum bid requirement of $0.10 will be enforced after an account is upgraded. This will impact your keywords that are grandfathered to bids below $0.10.
Looks like they are cleaning up all those accounts that still benefit from 1c clickthroughs - mine included!
I have about 2k terms on 1c... still spending $20 a day. Guess that will all change shortly... better watch my budget as most of my terms I don't actually make a return on - just enjoy the user at 1c instead :)