Caesar's Rewards : The Caesar's casino chain present on the Vegas Strip as well as in Atlantic City, Reno, Lake Tahoe and many other US and Canada locations. You get 500 "tier credits" per signup. Note that tier credits have no monetary value, but advance the user in the casino loyalty program, which eventually leads to perks like discounted stays with waived resort fees, free room upgrades, free drinks, free show tickets, online sports bet credits and a free annual dinner at a Caesars restaurant. The user must pick up their player's card in person at a Caesar's property for the reward to be paid. Those without an existing loyalty program account can use the link to create one first, the URL can then be substituted with your own player's card number for your own referrals. A map of Caesar's/Eldorado property locations is available here.
VideoPoker.com : A site offering free video poker and keno games in the style of those seen in casinos (such as Game King machines). Just for fun, no betting of real money, but racking up enough rewards points (through both your own play and referrals) can be cashed in for various branded swag and the top prize of a free three-night stay at the MGM Signature in Las Vegas. Periodic competitions are also offered to players in which the winner can earn real money, from $25 to $1000 USD.