I think we have to nail down the definition of a Beta. There are many 'betas' which are run while the game is going gold (or has gone gold) so the definition currently seems fluid. Technically isn't Playstation Home still a beta? They have been charging for bits and pieces as well as making promotional area's for various games. I would say that when Playstation Home closes that should be treated like any full product and that the "beta" tag stopped being true a long time.
I would suggest that currently each game would have to be decided individually.