Probably wouldn't be a bad idea to have a "Blue Light Special" and lower the membership fees for a month or so.......or give anyone who joins a "free" premium month.
IMO, if someone won't pony up $8.95 to try out the advanced features for a month, they won't pony up $4.95 or even $1.00.
I'm going to have a look this week, though, and see if I can easily implement a couple of weeks worth of Happy Hour while still displaying ads. Ad revenue is finally at a level that I don't want to completely close that spigot for any length of time.