I would keep donations enabled. It may cover server costs but I assume it’s reoccurring so why disable it when you may need it in the future? Also use excess donations on more in-game things, maybe even purchase more servers
I would refer you to the ToS, You are not allowed to make profit.
Don’t try to make money off FiveM. Not even your game services. Covering costs incurred from
third parties (server rent, product licensing, …) is fine, however any additional profit (including
‘donations’ other than to cover immediate costs) is not.