We have been monetizing a number of SEO projects with this affiliate program by CPA for the last half a year. 

+ We are pleased with the ever-growing popularity of the site/project, which allows us to attract players cheaper and more.  

+ Quick refund of the working capacity of payment means for players. Yandex.Billing was the first of all the partners we are currently working with. Most likely, in the near future, the roulette will fall off more than once, you know why. 

+ Support guys, just thank you, it's a pleasure doing business with you!

Of the cons:

- there was a problem with the output to WMZ, it was solved within 2 weeks.