Joe wrote

>Those who cannot afford to comply, will feel guilty and will probably
>promote your program with others.

I have a philosophical problem with increasing the amount of guilt in the
world. Guilt leads to resentment. This could backfire on you.

My experience is that those who cannot afford to comply don't give a toss
about the fees, so will use the SW anyway. If its good they'll keep using
it. All you can do is encourage them to buy it. Expired copies of SW, IMHO,
should degrade gracefully, ie 10 days till expiry, 5 days to expiry, 1 day
left, then feature lockout. If they keep using it, at least there is some
chance they will buy a copy. If they can't use it, it gets forgotten about.

Peter