The Best Miles Brokers referral program offers current clients a cash bonus for referring your friends to sell their miles or rewards points.
The Clymb offers insider pricing on premium outdoor gear, apparel, and adventure travel packages with free membership, plus you can earn a $25 credit for each new member that you refer to The Clymb who makes a purchase of $25 or more.
SilverJewelryClub.com offers $5 in store credit for each new customer that you refer to purchase quality jewelry at incredible discounts.
Refer your friends to get an American Express card to earn extra bonus rewards.
Updated 6/2/2014: American Express has increased the Starwood consumer and business card bonuses for new members to 30,000 Starpoints.
The Coinbase referral program offers both new and current users $5 worth of free BTC when you each complete a Bitcoin purchase or sale of at least $100 worth of BTC.
Plus, select college students can get $10 of free Bitcoin when you join Coinbase with your .edu email address today.
The new Google Apps for Business Referral Program offers you a $15 bonus reward for every user that signs up for Google Apps for Business via your referral link.
Google Apps is a cloud-based productivity suite for your business that helps you get work done from anywhere on any device.
The Dropbox referral program offers both parties 500 MB of free online storage space when a current user refers a new user who joins and installs Dropbox on their computer.
Current Bing members can earn 500 bonus credits through the Bing Rewards referral program for each of your friends who joins and reaches Silver Status.
Update: You can now redeem your Bing Rewards credits for airline miles and hotel points from popular travel loyalty programs.
Learn how to earn Bing Rewards Referral Bonus Credits and sign up for the free Bing Rewards program to earn credits for searching on Bing.
Kiva.org currently has a refer-a-friend promotion where each person signing up gets $25 free to make a loan.
Updated 4/23/2014: Kiva is giving away codes to lend $25 when you Retweet This Message on Twitter for a limited time. Just Retweet the message, and they will DM you a code.
Take advantage of this Kiva.org $25 Loan Offer to make a free loan to small business owners in need around the world.
The Boatbound peer-to-peer boat renting service offers new users a free $25 credit toward your first boat rental, plus you can earn up to $100 in boating credits through the Boatbound referral program.
The Isis Mobile Wallet application is now offering a $10 bonus for both new and current customers through the Isis Mobile Wallet referral program.
Fancy Hands offers half off your first month of personal assistant services, plus your first request is free, and you can earn a $15 referral credit for every new customer that you refer.
Fancy Hands is an online personal assistant service based in the USA that can help you complete numerous tasks from scheduling appointments and checking reservations to researching blog posts and proofreading articles, plus your first request is free.
The SpotHero prepaid parking service offers a $5 referral bonus credit to both parties to use toward parking in major cities.
Take advantage of the SpotHero Referral Program to get an instant $5 credit toward parking for new SpotHero customers as well as $5 for every new customer that you refer.
FatWallet is offering up to $1,500 in special referral bonuses when you refer your friends to the FatWallet cash back shopping network.
The FatWallet Cash Rebate Network allows you to earn cash back for shopping online at popular merchants, plus you can earn special bonuses for referring your friends.
The Coin credit card management device is offering a $5 referral program bonus when you refer your friends to get a Coin.
ShopRunner members can earn up to $10 for each new paid membership that you refer to ShopRunner, plus new members can get a free 30-day trial.
Check out the ShopRunner Referral Bonus Offer to earn some extra cash from your ShopRunner account.
Upromise is offering a $5 bonus for new members upon joining, plus current Upromise members can get a $5 bonus for each new member that you refer through November 25, 2013.
Check out this Upromise Referral Program Bonus for the Upromise college savings program.
The BeFrugal cash back shopping network offers current members a $5 bonus for each new customer that you refer to BeFrugal who makes a qualifying purchase.
Participate in the BeFrugal Referral Program to earn $5 for referring your friends today.
More Cash Back Referral Programs
Ebates Referrals – $10 gift card for new members.
Extrabux Referrals – $5 sign-up bonus for new members.
Mr. Rebates Referral Rewards – $5 new member bonus.
The Hulu Plus referral program offers both current subscribers and new customers 2 free weeks of Hulu Plus.
Check out the Hulu Plus Referral Program to get a 2-week free trial of Hulu Plus for new subscribers (instead of the usual 1), plus feel free to post your Hulu Plus referral links in the comments of this article.