1) We are now in pre-holiday season and the amount of advertisers is going up, thus prices are going up, thus my payout is going up...

or

2) My traffic has reached a higher level and somehow that has increased the amount of money YPN is charging for advertisers wanting to place ads on my site.

I really don't think it is either of these, but again am wondering if anyone else is seeing this and if there is a pattern. The jump was overnight; almost like somebody threw a switch.