Like a person said already he sold something for 4000 dollars, and the total fees taked from those were 25% soo those websites had stoled those person, but in the end its about trust and people do trust into those two companies, and them take advantages of the reputation they have.
I know PayPal charges very steep fees, but I can't believe they charge someone 25% in fees for a normal transaction.
That would be beyond insane as that would equal $1000 in fees regarding that $4000 transaction.
I don't believe PayPal is doing that to its customers. It just doesn't make sense.