Hahah yeah, I will (feels a bit cynical but maybe practical) raise all prices by 3-4% to compensate for this cost.

Won't packages increase the risk meaningfully though? It's actually something I've hesitated rolling out because of exactly this risk eg. 5 transactions for 100$ where 1 of them gets a chargeback is a much easier hit to bear than 1 trasaction for 500$ getting the hit?

I guess from a chargeback rate "%" perspective it might be better to have just 1 large chargeback instead of multiple small ones... but then at the same time it also reduces the evidence I can submit to Visa / Mastercard / banks that this person actually made multiple bookings.