eBay has not been around 30 years

Yes, it is true about holds on funds, as it has been for a long time

You also needed to have signed up for Managed Payments (far more than just verifying your bank account) before even listing anything for sale, which replaced PayPal for sellers more than two years ago and was announced two years before it came in

If you need not fully complete sign up for Managed Payments, and get the go ahead to start selling, then never mind 'holds' there would be no money at all paid out

How much you sold way back when makes zero difference, same rules for all sellers

eBay are not going to care if you leave. they will not even know

The buyers you are cancelling on, tough luck for them, eh?