Traffic is coming from 3 different sources to the same page. Only 1 vendor produced 0% optin rate. Traffic looks legit (countries, devices, ISPs all look good) that's what I think the topic was not suitable for that vendor's list.
I just bought my first 2 solo ads for the same optin page. One is performing very well (almost 50% optin rate), while the other gave me 0 optins so far out of 33 visitors and counting.
Both sellers have stellar reviews, so I think the difference comes from what those subscribers are interested in. One seller may have subscribers interested in email marketing (the topic of my offer), while the other may not.
Instead of buying solo ads blindly (too bad that Udimi doesn't have an interest filter), it would be great if sellers with subscribers interested in email marketing could get in touch with me!
I'm ready to buy thousands of clicks from the right sellers.