Just wanna let you guys know that RingCentral affiliate program in CJ had a big problem with people signing up with a VOIP number, it would generate an error if you used a VOIP type number to register for the service even after inputing your billing info.
Last month, I have sent almost 200 clicks to RC without any sales or leads. It sucks when their signup process required you to enter a landline or non-VOIP (this was told to me by a sale rep contacting me after the error, needless to say, obvious lost of sales and leads there).