Last year, my registrar wanted €64,99 to extend an online domain which I had created for fun.

No thanks.

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

	▲	account42 8 hours ago \| parent \| next [-]
		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.
	▲	mythrwy 7 hours ago \| parent \| prev [-]
		Namecheap does the same thing though, at least they did with an .online domain I have.