A couple of years ago ARIN increased their fees considerably - way higher than fees paid to RIPE for way less resources - and had a call with their management to express my frustration, not because I was paying from my pocket but because of the high discrepancy of the what they wanted to get and the quantity/quality of their services. Now I can see that their backbone services haven't really improved while their income for sure has.

On a sidenote, what I appreciate in both RIPE and ARIN is that you can have at least a proper discussion when you have valid arguments with their support teams.