If you combine
I wish some of the application descriptions were more fulsome. It is hard to figure out what some of them do and the screenshots are often not that much help.
with
There is no "trial" download and install available
you get
[...] perhaps leading to spending [more] money on apps that you wind up not really wanting and may never even use [...] (Emphasis added)
That said, can you tell us if your experience is that developers are offering trial d/l's?