Does eBay officially prohibit this payment method?

eBay has begun prohibiting sellers from accepting direct payments on eBay using credit or debit cards in their own merchant payment accounts.
eBay's move is clearly in preparation for the promotion of eBay Payments. If eBay accepts direct payment from buyers via credit cards, this will cause buyers to be confused when paying, not knowing whether they are paying the money to the seller or eBay. Currently, US sellers have received notifications one after another, informing them that their seller payment accounts on eBay will be closed. Although we have not heard of sellers in other countries receiving notifications, this is bound to happen.

Payment methods allowed by eBay.com
eBay has not yet updated the accepted payment methods policy on eBay.com to include eBay Managed Payments. Sellers can still accept payments from buyers using credit or debit cards in their business accounts. The payment methods allowed on eBay.com are:
paypal
PayPal Credit
Debit or credit card in the seller's Internet merchant account In-person transactions
Other payment options available to eBay sellers as an alternative to a business collection account:
1. PayPal Managed payments
This is a short-term alternative for sellers, as eBay will eventually require sellers to fully migrate to eBay Managed Payments, and this short-term option will not be available on eBay again until the summer of 2019.
2. eBay Managed Payments
eBay Managed Payments provides sellers with the ability to automatically pay into bank accounts and supports buyers to pay for orders using credit cards, debit cards, gift cards and Apple Pay.