Hypo

I'm listed on many big TGPs today, but they are not converting. I needto change the sponsor. I wont be changing the gallery or putting a bigger ad, just changing sponsors. Which of these would it be safe to change ads on (meaning they dont have an automatic checking removal script) -

worldsex -(sending massive hits - really need to change ad!!)
thumbzilla
easypic
persiankitty
callkelly