If you are going to pull links or not?

I have a site ive been testing out from a fairly new PPS sponsor the last couple of days, so far im at 5k hits with no sales and im going to be pulling my links in a few.

I just wondered how much traffic the rest of you sent to a single sponsors site before deciding whether to pull all links or keep sending traffic?

I have to admit, i typically only send 1500-2000 hits as a general rule of thumb but this site is owned by a friend of mine and i thought id send some extra just in case they were having a 'bad' run of it but even then, 5k wasted hits is 5k i could have sent to someone else, or my own sites.

Your thoughts, when is enough traffic sent to a single site to warrant keeping links up or taking them down?

Regards,

Lee