Maybe they will make it free for all. As you say the subs aint going to add up to much. I have a rough idea what they paid for this site and they must be expecting a shed load of revenue from ads to recoup the investment. They will only get that if there is a lot of turnover of posts and for the past few months its been pitiful.
Its quality not quantity that draws most to a web site, heaven forbid if this site should go down the road of others which end up with such a lot of dross posted.