Note: we are open to further suggestions, and as we have made clear in the past our intention is not to punish those who can't donate, but mainly to encourage people who are willing to donate to actually follow through, and to give us a chance to make our case to people who normally might not pay attention.
An interesting issue is whether we should really require people to come back to the site twice before giving them the permanent non-expiring license. It may be that this is overkill, and we should simply require an initial 6-month freeware license key, followed by giving them the permanent non-expiring license key on their next visit. We are open to making this change in the future.
Arguing for it is the idea that if they are still using it 6-months later but still don't want to make a donation, then they probably are not going to be effected by making them wait another 6 months.
Arguing against it is the idea that after 6 months they might be exactly ready to donate having realized they like the program, but that having a single click to get a non-expiring license may be just too easy to push and be done with (as opposed to going through the steps of donating), and so having to renew once may be just the motivation needed to differentiate the reluctantly lazy from the committed non-donator
