Donation-based monetization?
Do you consider donation-based a scalable approach and a powerful tool to chase your ARR objectives, and use it as the only approach and optimize it, not an early option before another subscription model.
What kind of product best fit this monetization model?
Somehow I got the feeling that a donation-based prizing model fits best to open source projects. At least, that's the only cases where I have seen it.
It makes completely sense to me, as it's open source.
Any other businesses I prefer "classical" monetisation models.