250 American Airlines points for signing up with E-Rewards

It's possible to win 250 points American Airlines to signing up with E-Rewards. In fact, it's not only American Airlines, it's also possible to win points with Alaska Airlines, Delta Airlines et JetBlue. Unfortunatly, this bonus miles are only available to newly enrolled members of e-Rewards

250 points American Airlines: http://www.e-rewards.com/Enroll.do?IC=cp8zojsy8a0

250 points Alaska Airlines: https://www.e-rewards.com/Enroll.do?aa=US&lc=EN_US&x=101&y=20&IC=cp8opad0n82&secure=1

250 points Delta Airlines: https://www.e-rewards.com/Enroll.do?IC=cp8qmqxl9f6

350 points JetBlue: https://www.e-rewards.com/Enroll.do?aa=US&lc=EN_US&IC=cp8r1mrqqk2&secure=1