Ebay at one time was also experiencing similar problems with payment tranactions, thats why they finally inforced Pay-Pal on everybody, and made most other forms of payment against their rules.
The reason Ebay inforce Paypal payment has nothing to do with anything other than Ebay.The new rule is designed for one reason & one reason only, so Ebay can make more $$$$$$$$$$$. EBAY OWNS PAYPAL.