Originally Posted by StarkReality

It can happen that your traffic doesn't work with a sponsor, it doesn't mean they are shaving, it just means you should move somewhere else or send traffic in different ways.

I had one very well known sponsor do 1:20000+, changed to another one and the same traffic is doing around 1:700.

I'd first check the linking codes twice, maybe there is some space in your url that makes it invalid or something like this...yes, copy and paste isn't always foolproof, happened to me once.