@Farah1 Infants - it's obligatory to host them for free under current stipulations. Airbnb is vague on older ones, but we (hosts) can charge for them:
"Infants (children under 2 years old) aren't counted as guests when you're booking a reservation and don't incur any extra costs. Some hosts count children as guests, which can add an additional guest fee to the reservation."
The second sentence doesn't say whether airbnb approves of that or not. 😉 "Some" cannot be interpreted as "a majority," but from the discussions here a vast majority of hosts expect to charge for infants as well (me too, so for the time being I do not allow infants).
// "The only person you can trust is yourself"