A lot of affiliate programmes I have come across say they allow their partners to redirect a domain name (which is similar to the partners main website name) to replace the affiliate domain name, in front of all the other variables passed in a URL string. So, it looks like that when affiliate pages are loaded up its part of the same website the link came from.
Is this OK or is it considered masking/cloaking, I have read more and more about this.
Thanks