1. Buying before defining the audience
Without a clear audience, seller selection becomes guesswork.
2. Choosing on price alone
Cost per click is not the same as cost per lead or customer.
3. Ignoring geography
Traffic from countries your offer cannot serve weakens the test.
4. Sending traffic to an untested page
Check mobile layout, forms, redirects and follow up first.
5. Measuring only clicks
Track the next meaningful action after delivery.
6. Changing every variable
Changing the seller, page, offer and follow up together makes the result hard to interpret.
7. Treating reviews as guarantees
Marketplace history reduces uncertainty but does not predict your result.
8. Scaling from too little evidence
An early test is information, not proof of a permanent outcome.
9. Forgetting follow up
For list building, the post opt in sequence is part of the funnel.