They mean you can deploy 3 free apps instead of the previous limit of 1

and you get those three apps free forever, can't skip that little tidbit :)

Or until PHPFog goes bust/gets bought.

Crazier things have happened, but it is hard to go bust with $10M in the bank - http://blog.phpfog.com/2011/08/11/what-php-fog-will-do-with-...