If you want to support the developer, buy the full version. But there’s no need to tell everyone else not to. Devs know the pros and cons.
For me as a student, I look at it this way: I can’t afford each and every software I would like to use, which is the reason that I think MacHeist Bundle(reflink) is especially great for students and private persons who do not make money or not much money though the apps. Second thought is quiet the same like this:
… To those critiquing, look at it this way. No developer was forced into participating, those who have spoken out regarding their involvement seem over the moon with the results to date, …
I am happy about the bundle I couldn’t afford many of the apps right away but wanted to use most of them for quiet some time now and one more thought against the critiquing.
On MacHeist – If a band puts up free tracks online, do you tell everyone NOT to download them cause it doesn’t support the artist?
If you are interested in the discussion, maybe you should have a look at here and here.