Affiliate sites tend to fail in the same ways. Here are the failures worth avoiding, roughly in the order people commit them.
1. Applying to programs before you have a site worth approving
New sites get rejected, and many advertisers impose waiting periods before you can reapply. Applying everywhere on launch day converts a list of opportunities into a list of closed doors. Publish first, get some traffic, then apply.
2. Picking the niche by commission rate
The highest-paying niches are the most competitive, and enthusiasm runs out long before rankings arrive. A niche you understand and can write about for two years beats one with better numbers that bores you by month three.
3. Ignoring the cookie window
A 30-day cookie on a product with a two-month evaluation cycle means you frequently won't be credited for sales you caused. Match the window to the decision timeline, not to the headline rate.
4. Writing for search engines instead of readers
Content assembled from other people's articles, padded to hit a word count, reads exactly like what it is. Google's helpful content systems target it specifically, and readers bounce from it. If you haven't used the product, that's obvious — and so is the reverse.
5. Recommending everything
A roundup where every option is "excellent" tells the reader nothing and is transparently commercial. Say which one is worst and why. Naming a loser is the fastest way to be believed about the winner.
6. Burying or skipping the disclosure
A footer link isn't compliant. The disclosure belongs near the recommendation, in normal-sized text, before the first affiliate link. It's a legal requirement, a network requirement, and — counterintuitively — not a conversion problem.
7. Chasing head terms
"Best web hosting" will not be won by a new site. Long-tail, qualified terms convert better anyway, because the searcher has already narrowed their requirements.
8. Publishing without internal links
An article no other page links to is an orphan, and search engines treat it accordingly. Group related articles into clusters and link them to each other and to your category pages.
9. No analytics from day one
You cannot improve what you cannot measure, and you cannot prove traffic to an advertiser without a history. Install analytics before your first post, not when you finally need the data.
10. Never checking outbound links
Programs get discontinued, pages move, brands go out of business. Links rot silently, and every dead link is a reader sent to a 404 and a commission that could never have been earned. Audit them on a schedule, not when someone complains.
11. Relying on a single program
Programs change rates, tighten terms, or close entirely with little notice. If one program is most of your income, you don't have a business, you have a dependency. Diversify across several programs and ideally more than one network.
12. Quitting at month four
Affiliate sites earn almost nothing for the first several months, then compound. The gap between "this doesn't work" and "this works" is usually eight to twelve months of consistent publishing. Most people stop inside it, which is precisely why the ones who don't succeed.
The pattern underneath
Ten of these twelve come down to the same thing: doing what's fast instead of what's durable. Applying before you're ready, writing thin content, chasing volume, skipping measurement. Each saves time now and costs more later.
The affiliate sites that work are, almost without exception, the ones that were built slowly by someone who actually knew the subject.