What will be the impact?
Or these project having to plonk a significant amount of money in paying for their domains rather than <insert thing which is actually useful>.
This is an incredibly awful move, I'm completely astounded that it was allowed to happen.
Why not just move to a different domain, and while your old one is still "cheap", do a redirect etc?
It completely depends on what they do, I've renewed for 10 years so I have time now, if they put the fees to >500 a year then I'll definitely move.
Do you own a domain yourself that people have been using for 10 years? You might feel differently about the ease of "just moving"