The major reasons are: If you have so-and-so installed, your website or blog will load slower. Many users including myself notice that as soon as you are getting close to the required payout amount, your average pay per click will become a few cents. Most importantly, so-and-so doesn't seem to work well with Adsense.
After disabling so-and-so, I completely forgot about it. After about half a year, I found out that so-and-so had deleted my account with my remaining earnings, and I did not receive any warning email beforehand. I'm a bit shocked about that. For most of the online money making programs that I joined, most don't care if you are active or not, whenever you feel like using or promoting a service, you can always pick it up anytime at your convenience, and you can get paid whenever the minimum payout threshold is met. I consider those are basic and fair business practices. What so-and-so does is a bit mean and unfair. Well, maybe that's why less and less people are using so-and-so for in-text advertising nowadays.
To be fair, some day I would still want to try out other in-text advertising providers, maybe I will find a good provider with some decent service and reasonable user policy.
