Also, if someone signed up in March they got a free stamp set. They don't get that in April. Even better, if they signed in Jan. or Feb. they got two free stamp sets. But some months there's no special at all for signing up.
Usually if someone has decided to sign up, they should just go for it. There's no point in worrying about whether or not there might be a terrific special the next month.
There's often incentives going on for demos as well. For example if someone signed in March she has an extra month to work on sales for getting a couple of free hostess sets from the new catalog. Usually the benefits of signing up "now" out weigh the benefits of waiting to see what possible special there might be.
I hope that made some sense.
Sencie