I really don't see how any of these ringtone offers differ other than the name people see at the sign up page. All of these sign up pages look identical.
subtle differences in landing pages make the world of difference. also many offers have differing hidden business rules that aren't public. for example, a lot of mortgage offers will only pay-out on over a $100k loan amount.
what would you consider a good eCPC? with azoogle I average just over $1, and go down to around $.85 sometimes. I am talking for all offers, I have gotten out of the ringtones thing somewhat, used to be in my top 10 now it is about 25 or so.
I really don't see how any of these ringtone offers differ other than the name people see at the sign up page. All of these sign up pages look identical.
Youw ould be surprised as some landing pages work much better for certain audiences. IT is crazy as one offer may work wonders for one music type the other may work great for another music type. but .61 EPC aint bad at all!
I'm not sure where your traffic originates, but if that is PPC then it's your keywords that need a bit of work. I usually maintain a 1/8 conversion rate with the exact same offers you are promoting.