[insane_dreamer]

Donation fatigue even is more real than subscription fatigue.

The only way I can see this working is a recurring donation with a low enough amount that people will just set it once and forget it.

So instead of a $1/month subscription, you could try a $1/month recurring donation.

[cdrini]

Donation fatigue? The only time I'm prompted for donations online is Wikipedia and internet archive in December. That's about it. I can't think of any other service that asks for donations.