The complaints are coming from the folks who paid $45, not the founders. They're not getting the additional stuff. This isn't the first $25 sale either.
The race to the bottom on PC prices has been great for consumers, though it's becoming hell on indie devs.
Ah okay, gotta...
Yes I know as a big steam user that GC3 was on 50% off for about 24-48hrs around black Friday 2014. This was actually how I found out about its very existence! I was completely unaware GC3 was in development (happily still playing GC2 off and on at the time). I did not buy it then as I personally have a very firm policy of never buying betas no matter what, I like my games complete. The only reason I made a exception (the 1st ever) was on the steam forums a lot of folks thought it was being released at the end of March/April time, so I thought what the hell! Since read it may be June or later for final release, now that I have it and on my 2nd game I am happy I got it. So alls good.
Yes, I understand low prices is bad news for indie devs. I play a lot of different games from indie games to those by the biggest devs like ActiBlizzard. The games that are really bucking the trend atm and raking in loads of money are those with a Cash Shop to buy, well essentially 'fluff' items for the game and misc stuff like extra character slots, extra stash space, etc They are often based on RNG/loot finding games.
A example of a Indie doing really well is Grinding Gear games with Path of Exile (based on Diablo 2), they are or did sell packs for $40 to even $10,000 each to support the game, obviously you got some goodies but quite frankly they are not worth the amount you paid, alternatively you can pay exactly $0 and play for free. It seems to work thou as majority of players spend at least $40, a lot $100-$500 and the odd rich guy/girl $10,000!
4x strategy games don't suit this method but if a dev can figure out a viable method it could boost indie dev by a huge margin. No idea how to do it personally but indie games dev does need a financial boost. The reason Grinding Gear model works is there is a small % of gamers who are very rich and happy to throw money at there favourite hobby, which kinda makes up for all the penny less students playing...