What happened to the good old days when people jumped at the chance to be a beta-tester?
Well, maybe that was when the beta was free... Developers started moving towards "preorder now and get in the beta!" and people began complaining even back then. In this case the price is lower than the full game is going to be (though at least one game is $70 right now for early access where the final game is going to be cheaper) so it's not as bad as the "preorder to get beta" deal.
Where have you seen that the price now is cheaper than the full game is going to be?
I really doubt that's gonna happen.
It will be if they do what Arma 3 did. I think I only paid $20 for alpha/beta/full game awhile back. Set to retail at $40 if I'm not mistaken. --- i7 3770k @ 4.5GHz  HIS IceQ X^2 7970 |1200|1600|3GB|  16GB Ripjaws Z 1866  ASRock Z77 Extreme4  250GB Samsung 840  2TB Barracuda  CX 600 PSU  H80i