Apart of some critique here and there, I am sure this service will become a good one! The platform is very well designed and every campaign is running smoothly (if properly set).
As I already told to the OP, they should work to improve the following things:
1) getting quality backlinks to raise the blogs' PR
2) publishing fresh content to let blogs looking unique & updated to SE's eyes
3) spreading accurately the comment(s) to avoid thousand comments on the same post(s)
These are the ones that comes to my mind now.
I hope the program admin will consider these notes as possible improvements. Thanks