How can you buy passes on howrse with PayPal without having to link a debit card?

On PayPal, you need to have money onto the account. It is taking it out of your account which is linked to a debit card. I don't think you can. However, you can earn diamonds in free offers. 10 diamonds = a pass. There are also things like Zeevex and Paysafecard where you can buy the card and use it without having to own a credit/debit card.