We encourage using another method of contact: Create an LFG listing (to show the campaign presentation, and you can safely share the LFG Link across the forums). Another option is you are encouraged to describe the campaign / system / game times a bit more in this thread and ask for replies here (and you'd send that Join link directly to the people who reply who you want to invite in). A third option, you could ask for people to Private Message you applying/asking for the link.