Is this normal for you guys? Because I’ve never seen this before and find it pretty trashy. If you’re resorting to asking/allowing your friends publicly post like this you’re probably doing something wrong…
Mom's group definitely isn't the right place for it, but their are definitely certain communities I'm in where friends "auction" off their other friends for dates and it's all in light-hearted fun. You post good pics and brag about your friends and then they get to meet and chat with a lot of other people with the same interests. Rarely does it lead to anything but I wouldn't necessarily say that they're "doing something wrong."