how about milesource.
in jan. 2004, they got rid of referral pts for all pts earning opportunities except for purchases.
They raised the redemptions for a $50 gc from 5500 to 21000.
Now, if you just click and do the trivia for free pts, you have to do it solid for 23 months everyday just to succeed. Oh, if you miss days, your pts start expiring in the 24th month.