Now e-Bay wants my SSN and bank account info . . .???

[Oren Grad]

Details are all here, including the partial-SSN requirement:

https://pages.ebay.com/seller-center...s-on-ebay.html

[Drew Wiley]

I wouldn't touch it with a ten foot pole. Phony EBay sites and logos pop up from time to time. I got one from Nigeria once, of all things listing a rare large format lens for sale via some circuitous payment route. I changed my password immediately. Cell phone spyware phishing is even worse. Merely hit a link and they're in. That's why I do zero banking and financial transactions with a cellphone; too risky.

B&H also wants a partial SS # for their sales tax offset discounts, or rather, the lender bank itself does, which I'm not familiar with, along with all kinds of other personal info. But by merely having your date of birth too somebody could run a system giving the probability of the earlier prefixes. I'm not suggesting there are any bad intentions in either case. But once a hacker does breach the system, incredible numbers of people could be potentially affected without knowing until it's too late. So the less parties that do have key information, the better. I've known even local police fraud detectives who had their identity stolen, and it took even them months to iron it out.

[BrianShaw]

Is that why, as a buyer using PayPal, some payments are identified with the seller email/handle yet others are identified as “eBay”?

[Corran]

Well that's interesting. Haven't sold anything on eBay in the last year or so. Facebook Marketplace works fine...

[drj52]

Is that why, as a buyer using PayPal, some payments are identified with the seller email/handle yet others are identified as “eBay”?

Yes.

[drj52]

eBay has been gradually migrating sellers from PayPal to their own payment processing service for nearly three years. Once migrated, payments to a seller are processed by Adyen, an international payments platform, and sent to the seller’s bank account (after eBay fees are deducted).

[Roberto Nania]

The same was applied by eBay Italy. You have to update your personal information with bank account and fiscal number if you want to continue to use eBay as a seller.
I see two reasons here: one, eBay wants to part away from PayPal in order to make more profits; two, Italian authorities wants to tax everyone who sells even if the objects are second-hand used items.
Though times...

[BrianShaw]

Income reporting to tax authorities... makes sense.

[Ulophot]

I got a message about no more PayPal, but nothing about SSN.

[Oren Grad]

Income reporting to tax authorities... makes sense.

There may also be know-your-customer financial services industry regulations in play.