Does Hubpages allow an author to give away, say, free movie tickets? Someone chosen at random from the comments left on an article and contacted through hub pages contact info, so that no one - including me - would have to leave their e-mail addy out to get spammed?
Using the HubPagaes contact feature gives the recipient the personal email of the sender. And replying then discloses the other person's email back.
All giveaways would have to comply with all rules and regulations of all countries worldwide (unless otherwise limited) or it could put HubPages potentially in a position of liability. In some countries, contests or giveaways with prizes are considered lotteries, aka gambling.
Yea, it's probably a bad idea to offer an incentive such as a fee give away on your hubs. Something like that would be best offered on your own website or blog or to the followers in your social networks.