I think also freedom is not free.

I often download a 15 or 30 day trial of some program and that sounds like a lot of time, but it can take a day or more to really evaluate something and I need to multiply that against some guess of the probability we will really adopt it. Well we have lots of tasks that have a 100% probability of "must be done" and those are more important and then the trial ends and I forget about it.

If you make somebody put some chips in the pot upfront it makes them more serious, like they not only have something to gain but also to lose.