Used stamps exchanges.

I really think there should be a stricter selection of users. I run an excel tab to keep up with all the exchanges. It is frustrating to find out that of 136 letters sent in last 12 months, not one of direct swaps got lost and 13 from 25stamps and 50stampsclub did. What does it say?
Some haven't logged in for months, some don't reply to messages. Chaos.

HR-83
HR-105
HR-116
HR-119
HR-120

just some of those

You receive addresses of members that have outgoing registered exchanges and that have logged in in the last 30 days.
For exchanges that are not registered because the recepients are no longer active, you can mark the the exchange as "Mailed" and that exchange will be automatically registered after 90 days.
You have this option in the first page after you login.
Also, members of exchanges that get expired are added to your banned list. You can view this list from the page "Blocked members" in the left menu.