I've experienced major javascript errors with prosper. Errors so bad that the landing pages will cease to load. It seems like it's something to do with doctype / content-type / validation. I'm not JS expert, so I really don't know the cause.
I've also been experimenting with my own tracking system, BUT mine isn't scaling well and I don't have the time to rewrite it. I switched my campaigns back to Prosper and saw an immediate 50% plus drop in conversions and I'll be damned if I can figure out why. So with all that, I need another option.
Google / Yahoo / MSN pixels work "ok". However, I'm not one willing to give all my data to the big 3 and I'm tired of waiting around for the networks to place them.
Oh and spliting up my subs... thanks for that tip but I need something a little more robust. Spliting up subs for 1000's of keywords manually... no thanks.
It also needs to be self hosted or hosted by a damn trust-worthy company.
Oh and I'm not some noob, I've probably been at this longer then 99% of this board.