I will not 'run' Mach3 without buying the license. If I decide to go with Mach3, I will definitely buy it. The cost, as you point out, is minimal . . and it would not matter even if it wasn't. I don't do bootleg software.
Presently I am evaluating it and I have some concerns about the bugs that effect my own objectives and I also want to play with the interesting brain functions before I commit to this particular software.
It just strikes me that crippling single point turning in an evaluation version of a CNC control package is not a smart move. If I wanted Mach3 for a lathe, I would have moved on already. I think a timed eval would make a lot more sense.
As I said, it is not a big deal to me for my purposes, just an observation.
That being said, I will add though that I find it annoying to not have a distinct list in an obvious place of what is crippled so that I do not waste my time trying to get something to work that is intentionally disabled. I had no idea, for example that 'run from here' is crippled until I read your post. I did notice that it did not work worth a hoot, but I chalked it up to another bug. I cannot seem to find the automatic Z axis feed increments either . . . so now I wonder if I missed something or if it is intentionally disabled.
Wasting people's time unnecessarily is not a particularly good inducement for them to then spend money on your product . . just another observation.