Added a policy/rule (don't want to phrase it like that because rules and policies are yuck) that states we remove people from the waiting list and they lose their chance of joining after two days of a leader/co-leader contacting them. It's just annoying (and hopefully will weed out some inactive might I add) when a leader/co-leader says there's a spot for you and you don't respond, especially when there's a lot of people on the waiting list like there is now.
How about being patient? We can't all do things at a blink of an eye. Wait and if you aren't added after 12 hours (because most obligations for people will be over), then you can ask again or contact a leader. Thanks.