I had no idea that was the case. I have used eBay for 6 years, but only started selling recently. I offer PayPal and PayPal via credit card payment to pay for the items I sell. Are you saying that the first time I accept a credit card payment via PayPal I will be upgraded to a "business" account automatically?
You will have to double check their FAQs, but this caused quite a stink on the ebay forums a few months back and I believe this is the case.
BTW, reading the ebay forums is very educational, but never post to them with your selling i.d. because the fruitloops of the world may mess with your auctions.
I have a selling i.d. and a posting/buying i.d. This is the best way to safeguard your personal identity and your business as an ebay user.
Getting Started - Personal Accounts
Why did my seller deny my payment?
If your seller has a Personal account and you have sent a credit card payment, it may be denied by the seller. Receiving credit card payments is reserved for Premier and Business accounts. Also, your seller may have reached his Personal account receiving limit. Contact your seller for further instructions