Sites like e-bay can INSIST all they want that I link a card; if it becomes a requirement to USE the site, I'm gone, and publicly out them for it.

That's MY personal information -- *I* decide when/how/to whom it gets disclosed. The "system" can bite me, about 6-8" below the back of my belt (as I lyrically expressed to my bud/co-worker yesterday, "hairy and aromatic -- HAIR-omatic!")