This is the question that gets asked the most, but it's the one with really no answer. It depends on a lot of variables, so you can make anything from zero to tens of thousands of dollars per month. For me personally, I don't make that much from Clickbank, and never have. I take in about $100 per month. It isn't impressive, but I'll explain more about my stats below.
Sorry to hear you had such a bad experience with Clickbank. Refunded 5 weeks later? That’s pretty extreme! I could not find any info on CB on whether gravity takes into account refund rates, but from other blogs, I read that NO, it doesn’t take it into account. The Earned/Sale category however does take this into account, which is why the average $ earned per sale will sometimes be different from the actual commission you make.
Affiliate marketing is commonly confused with referral marketing, as both forms of marketing use third parties to drive sales to the retailer. The two forms of marketing are differentiated, however, in how they drive sales, where affiliate marketing relies purely on financial motivations, while referral marketing relies more on trust and personal relationships.
One factor that you must be aware of though is that Care.com is a peer-to-peer arrangement. That means that you will be in direct competition with other pet sitters in your area. You must price your services competitively in order to get business. Once you begin to develop a list of regular clients, you will be in a better position to raise your rates. This will be particularly true as you get referrals from those customers.
In April 2008 the State of New York inserted an item in the state budget asserting sales tax jurisdiction over Amazon.com sales to residents of New York, based on the existence of affiliate links from New York–based websites to Amazon. The state asserts that even one such affiliate constitutes Amazon having a business presence in the state, and is sufficient to allow New York to tax all Amazon sales to state residents. Amazon challenged the amendment and lost at the trial level in January 2009. The case is currently making its way through the New York appeals courts.