In article ,
"Jon Peltier" wrote:

Value is relative.

I agree - that's why I asked the question...

I would implement a routine that gave them a 30 day introductory period,

The motivation behind the question was more to the point that, while the
type of system that you describe may well be warranted for a
comprehensive commercial application, it's probably NOT worth the
development costs for a few macros.

Either spend a lot on developing the protection scheme, and charge a lot
for the application, or sell it cheap enough and provide good service to
encourage payment.

My skepticism came from the type of questions asked by the OP, which
suggested to me that there would be a sharp learning curve to produce
anything solid.

The flip side is, only the most foolish of businesspeople, IMO, would
agree to license anything critical (and so worth substantial
remuneration) containing a time-bomb on a period-to-period basis from a
single individual, and that therefore the potential return on investment
was low compared to the investment in developing comprehensive
anti-piracy solutions.


That doesn't mean that there aren't foolish businesspeople out there, of
course.