Well, how about the protection of my identity or personal details?
When you know where it is stored and no one can get to it, I can understand the fraud issue and you do not want to sponsor the bad guys...
On the other end I donīt want to just give my identity to just every webmaster program...then I can ask them the same...to be sure that they are the owners of the program...
I will promote a webmaster program, but please before that show me a copy of your ID, I could be promoting the wrong people...where is the end???
