I'm surprised there aren't more topics on the boards regarding the fact that Paypal may hold your funds for 21 days.
Probably because very few sellers will be affected. Read the details here:
http://pages.ebay.ca/sell/update08/rewardsfaq/index.html#16
As for the legal question, I have no doubt that their plan is perfectly legal. Canadian banks which are highly regulated are able to take similar action, PayPal is not a bank.
since they are registered in the USA
PayPal Canada is NOT registered in the USA, I believe they are actually based in Singapore much like eBay Canada which is a Swiss corporation.

"What else could I do? I had no trade so I became a peddler" - Lazarus Greenberg 1915
- answering Trolls is voluntary, my policy is not to participate.

"What else could I do? I had no trade so I became a peddler" - Lazarus Greenberg 1915
- answering Trolls is voluntary, my policy is not to participate.