I apologize if this is in the wrong place, I didn't know where else to post it. I value the incredible depth of knowledge that is shared among users of this site and I'm hopeful that someone can answer my questions.

I got an e-mail today from MyPoints asking me to sign up for MyPoints Dining. I am already a member of UAL Dining and UPromise (which have dining rebate benefits as well). By joining MyPoints Dining, will I be erasing the UAL or UPromise benefits?

In other words, how many of these kinds of programs can I register my credit cards at and still recieve overlaping benefits? Will registering in one automatically erase me from others?

Thank you in advance.