Bukisa does not have a long referral program, but a good one. 25%, 5%, and 1% of your referral's article earnings. If you sign up one referral who works hard at getting their own referrals, through adding their referral link to their articles, or other places, you will have a passive residual income growing all the time.
I have thirty or so referrals, and about three of them are starting to write a lot. They have made me a residual income of 5 cents a day so far, which may not sound like much, but one cent times 365 days in a year is $3.65, and they are still increasing that residual income at a rate of about one cent a week. So, in a years time, I will be making about $200 a year from the referrals I already have. Plus, I am still writing my own articles every day, which means more permanent places to get referrals from.
Anyway, give it a try, it's free, and there are no deadlines or restrictions, except your articles need to be over two hundred words.