Carpenter
You are completely correct in your observations regarding users behavior in general, when dealing with all customs and developers.
Unfortunately this is human nature when we receive anything for free.
People for some reason, unconsciously get a mindset that they somehow deserve more from the product itself as well as those who made the product.
And further there grows a false sense of entitlement, that oddly does not occur when said thing is purchased. Logically one would think it should be the reverse, but at our core we are illogical emotional animals.
There have been countless studies on this phenomenon, especially in the areas combining sociology, psychology and economics.
It is known as Pricing Theory, and regardless of what the item is, most people will behave as predicted by this theory.
It is actually quite fascinating, as behavior you mentioned is directly addressed.
I can say I have found this theory to be applicable on all levels.
Read some of the comments in the market, and compare how they differ between paid and free.
Notice the venom when an app is only a free trial, and then costs after the trial.
Even when explicitly stated that it is only a trial, the devs them are attacked for being sneaky, or being a scam artist.
Reason being they used it for free and now believe that they have an inherent right to continue to use it for free.
We are complex creatures in a complex world, where common sense and common courtesy are anything but common. And the more we rely on connecting to others virtually and not personally the more coarse we shall become. Evidenced by the way people act in forums and discussion/comments sections. The anonymity provided by a user name and avatar, turns some into complete slime, saying things they would never have the guts to say in person. Opinions are presented as fact. Fact is dismissed by opinion.
These technologies have had the reverse of the intended effect, they have directly caused an overall defilement of humanities abilities to communicate, due to a depersonalization of those we communicate to and with.
You can read about out in my new book, from my Danceswithbongs' Guide Series.
How to Survive Humanities Asspocalypse: Tapping into your inner Fonzie