So before purchasing referrals-
First, think: Is the site reliable? Does it really payout? How long has it been in the business? Will the referrals remain attracted to the site?
If the site seems a bit like scam, you should not invest your money. And also, dont invest in sites which are not too attractive for its members.
The best are the sites which allow payment for referral purchases through the site account. So you can pay from what you have earnt. These sites are usually trustworthy.
Secondly, think : Does the site offers REAL referrals? Some sites are rumoured to sell fake referrals. For example, you may pay money for 20 referrals. As they dont guarantee about the referrals being active, so you just see a few of them being active. You dont know whether the inactive ones are for real or not.
And then, think: Is the price well justified? How long will it take you to earn back the money from your referrals? If the expected time is large, you should not invest. For example, WORDLINX. This is a very good site in terms of number of ads available. Ads are added throughout the day, and each is 1c worth. But referral commission the site offers is just 5%. So for each 20 ads your referral clicks, you receive 1 c. But referrals cost about $1 each. So earning your money back should take a long time, furthermore provided that your referral remains active.
If you follow these simple rules, you will be able to face profits within a good time.
I also have a couple of programs through which i get free referrals. Maybe i will review them some day later. Thanks to all.