I wouldn't really call signup4cash a "new program" - they've been around longer than some of the somewhat fresh "big names" you see here.
It's just previously their sites were only open to high volume private pre-arranged affiliate deals. Just from when I became aware of them it was about 3 years ago, and I know they've been in operations since before that.
Of course, none of that really matters. All I know is Donnie sends my checks every month.
-Phil