Hi @Sable8 do you have an EV? It's interesting that only non EV owners alway ask this question....
I have an EV and offer EV charging. Offered for free, but locked off, only opened on request.
When you have an EV, you'll understand why its a mindset shift. There is plenty of commentary already on Community Centre about EV charging and why the mindset shift.
Guests will only want to pay for EV charging when its a super charger. Not a slow trickle charge. And I'm reasonably sure you haven't installed a Tesla super charger. And besides, not everyone has a Tesla anymore, 50% of EV sales are non Tesla so hopefully other car makes can use your charger.
It's a feature to make your property more attractive like the other commenters said. So don't charge.
Hope this helps, regs MK