Personal tech support would be a high-chargeback environment with very little way to defend against fraud allegations. Travel agencies sell a product that is to be delivered in a foreign country, which is a scammer's favourite promise. And hair extensions... I guess that must be a high scam market, but I don't know why. Being at the end of the list, I assume it was added after experiencing a lot of issues with that type of business.
Travel agencies also sell a product that’s often delivered much later, when the agency or a supplier (hotel, airline, etc.) may no longer exist. This increases the risk of chargebacks.
