So I know a few people on here have me added. I don't want to be some antisocial assjackal right now but, a few people have been sending me way too many invites. That's cool and all, but you don't need to send 3 or 4 in the same timeframe. I was actually streaming the game for some people just then and got at least 4 invites in the span of 5 minutes from various people.
What I'm trying to say is: If the person doesn't respond, the best course of action is to assume they're busy and not resend.
I have a similar problem. I have 35 people online with the game. I will get tons of invites. I appreciate the popularity, but only send one or two. Not one after the other for 5 minutes. CoD has the same problem
Welcoming Committee- "The business of gaming is business"