I think it's exactly what it says it is, no hidden agenda. Although I trust eBay as far as I could throw them, I don't think this has any bearing or effect on personal sellers.
"With a Business account, you can associate your business name with your account. You will also be notified when we offer business-specific services and events, such as our Seller OnRamp program, or future networking opportunities with other ecommerce businesses."
Seems pretty clear to me.