Sometimes promotions never end. At least, that’s the case with Pocket Legends. In April, developer Space Time Studios kicked off an anniversary celebration that dished out free access to six areas for the generous asking price of $0. Now, the studio is announcing that those areas will remain free FOREVER — or until we all die in 2012, one or the other.

That’s a deal, but you have to wonder how Space Time plans to make money while a large swathe of its instance-based content is free. That’s where this comes in: the studio has just announced a brand new “premium” area called the “Sandstone Caves.”

It’s made for players around level 20 to 25 and includes what you want: a new town, a new series of quests, new enemies, new bosses, and new weapons, armor and items.

The price? 10 in-game Platinums, which should help satisfy the need for Space Time to fill its coffers. The lowest amount of Platinums that you can buy at the moment is 30 for $4.95, which is likely the catch here.

It’s also possible to earn free in-game cash in exchange for taking part in one of those now-infamous marketing loops. “Yes, you can still get free Platinum with Tapjoy in both Apple and Android devices," a representative told us.

Just for reference, the areas that are set to remain free are Balefort Castle, Fathom Crypts, The Lost Expedition, The Ancient Swamps, Balefort Sewers, and last but not least, The Alien Oasis Trilogy.

Pocket Legends is one of the deepest, most well designed mobile MMOs on the market to date. As we’ve previously noted, we reviewed the game last year, but a lot has changed since then, so you’d probably be better off reading the official “Quick Start" guide to get a good sense of what Pocket Legends is about. Oh, and if you’re in the market for a more in-depth look at Sandstone Caves, these two articles wouldn’t be a bad start.