I've been sending traffic almost since the beginning of this affiliate program, since last year, then the rates were just awesome (they worked only on CPL), then they lowered them, like in several stages, affiliate program did not work for part of January. I got last payment a couple days ago and if i had delays it was no more than 24 hours. I am still suspending the traffic.
One of the drawbacks of this broker is that all the events that affect the profit were either kept silent or announced a few hours before. For example changes in rating happened silently. Technical works were announced a few hours beforehand.
The transfer from the 1st of March to Revenue Share was announced in the afternoon of the 28th.

This affiliate program also sells traffic but the rates in some countries are overpriced. I think if they will take the right approach with adequate pricing policy, the affiliate program will continue to live.
At the moment I am both a web as well as a realtor and I should say that there is not much traffic in the system and it is expensive.

This is purely my personal opinion.