The challenge I have with payware is the inability to try first before rewarding (paying) the “creators”, putting creators in quotes as a lot of payware is “borrowed” from some one else.
To me a lot of payware offering is not worth it, the latest DRM offer beeing the perfect example, a lot of hype from the usual overexcited fan boys to end up with, to me, a very weird physic on an average graphic work. I was able to try before rewarding, I am glad I did, I would have been pissed and desapointed if I had to pay first.
There is a lot of much worst than this DRM exemple out there, a lot!
So for me being able to try first is very important, I will reward if I find it is worth rewarding, the alternative is the donation link, but it takes the balls and the confidence that the mod will be appreciated on its value.
But at the end of the day, asking for money first or waiting on donation, might end up you get nothing, since in both case the links will be available, that is for sure. You are just taking the chance of pissing off more people asking for money first without the opportunity for the player to determine if he likes what you are doing before rewarding.
Most every thing we can buy we can try first, why would mods be any different?