Unless you are using a credit card with PayPal, be very aware that any "guarantee" is from PayPal and can change at their discretion.Mind sharing this “other company that accepts PayPal please ? Some earlier mentioned XUBA does not accept PayPal anymore.
Payments using a credit card in the USA are protected by federal law. Debit cards have less protection (but are also protected by law). Linked bank accounts are at the discretion of PayPal.
How likely is PayPal to refuse protection? Not very, but everyone should be aware of the differences.