Hey B,
I think I started off a bit slow when I started with CPS many years ago, but from memory, the increased exposure did work for me and even moreso when I had met Trish, Brian, Andy and most recently Jon also.
They have been consistently top 5 (including top 1-3 at least 6 times) over the past 18 months (good old statsremote I have to thank for being able to just come up with that info so quick hehe)..
As for affiliate support, they are easily equal in my top 3 – and in particular I like the way that if you ask them something or suggest something it’s generally a straight ‘yes or no’ with no messing about.
As for ‘working for some’ – well I have similar experiences with others doing well on ones I don’t – even with more exposure – so I think it’s often to do with traffic/geo-locations etc, but again as Simmo said it’s “how” you promote of course as well as “how much” and the Instant Cashins certainly sells well from my experience.
If you spot this post, I’d be interested to know your top 3-5 consistent earners? 
Cheers,
Geno/CC