When Source had redirects I disconnected out of spite no matter what clan did it to me. I even disconnected from TAG’s a few times over it. People join a server to play in that server. If they want to play in a regular server and get redirected to a customized-to-hell server they aren’t going to be happy and will tell their friends “hey watch that WCU server, it’ll kick you over to a custom garbage server if it’s almost full”.
Let people fight over the slots. It makes us look much more popular if people have to sit there and try for 5-10 minutes to get into the server. Better still, it means we are doing a good job of retention if people are willing to sit there and wait to get in. I myself have had to wait to get in the CSS server before, something that was unheard of a few months back. Definately have a custom if you want, but leave it up to the player as to whether or not to join it.