Affiliate Losses
Some affiliate programs fail, go out of business, or flat out cheat their affiliates by not paying what they owe. Having a large number of diverse niche products means you will not be held hostage to any one breakdown. You have multiple streams of income as insurance. Mourn your losses and add a new niche.
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See: 101 Reasons to Micro-Invest $9.29 in Your New Scanner Life with Affiliate Marketing for Scanners
