yeah same here. I canceled my account on name.com because I had previously obtained a .art domain maybe for ~15-20 USD / yr. Then they wanted $50 USD a year to extend it. No thanks, dropped the domain and moved to namecheap
Namecheap does the same thing though, at least they did with an .online domain I have.
If the price increase was from the registrar and not the registry you should have been able to move to a different registrar with saner prices.