Solo ads can be very effective when you have a legitimate email list with subscribers that are genuinely interested in your offer. for example, if you offer a free ecommerce plugin to subscribers who are interested in learning how to sell online using the wordpress platform, you can expect a very good opt-in rate to your squeeze page /website.. When you first start selling solo ads, a good idea is to ask a friend or 2 to buy from you and get your first couple of testimonials that way. another is to offer slightly cheaper clicks at first to attract buyers.. ¦