That last group is your people. The rest are guests in someone else's house who happened to walk past your door.

You can't be strategic about collaborations if you don't have a strategy to be strategic against. You need a plan of your own to measure every incoming ask against. Goals for the quarter. A content thread you're actually committed to. Offers you're warming people up to buy. A clear picture of who you want more of on your list and what you want them to do when they get there.