Interesting suggestion. Something to really think about.
For me, based on my current experiences, I think if what I’m offering is something I plan to charge $1-$1.50 for, that I’ll probably generally try the $0+Donate model and see how it goes. Worst case scenario is no one donates, best case scenario is that people will appreciate a free product and that some people will donate and that when they do, they might feel more prone to make larger donations than $1-$1.50.
But… if I’m considering a $2+ price tag, I think I’d put an actual price tag on it.
My suggestions might of course be different if we’re talking a big studio or one that spent substantial time or money on their release.