When I had Drunslut running, I would offer a full membership for $24.95 on the join page. Then if they exited the joinpage, we would pop a $3.95 trial that recurred at $39.95... It worked well, of course there wasn't near as many popup blockers out there, but it was a good way to get most people to buy a full membership, yet would pick up some from those who wanted a trial...
