It is good that you can donate Bitcoin, but cash is still a major payment method for donations. This will help, but if you really want to donate you can give cash, so I don't think it will help a lot, unless most people dom't use fiat.
Reminder: Make your donations using 1 sat/B. They don't care if your donation reaches them today or tomorrow...
In fact i sustain that every bitcoin transaction should be done at 1 sat/B unless there is some sort of emergency. Say no to wallet traffic guessing nonsense, bitcoin transactions are cheap when you are in control.
So next time you wanted to gift $10 to someone, don't let the (idiot) wallet burn $5 to send, when a manual 1 sat/B fee could easily lower that to about 3¢.
I agree that you should use lower fees if your transaction doesn't need to be done right away, but 1sat/B is so low it would take a week or more to process the transaction. You don't need to give half of the transaction for fees, but don't be so cheap, 50 cents on a tx of 10$ isn't that bad, you wont go broke.