I really dont know from adv. point of view, but as aff. they are best. You can go for them, they are one of the best in industry.
Depends upon your Niche, If niche is good SAS is best as they keeps your program on homepage of Affiliates till 20 days
I've never used them as an advertiser, but affiliates seem to absolutely love the network.
I didnt find any IM realted adv. on Shareasale. Most of like shop, loan, lots of other services.what kind of products are listed in there mostly?
Im with them only because my network is with them But i find their interface, old outdated and something from the 1990's. They cant even offer pixel tracking.