hmm, do automated accounts really have good engagement? Twitter is all about that, I'm certain an account with 500 followers can make more money than an account with 5k followers with the right niche and engagement.
Are all your accounts in the motivational niche? I find this niche too broad, can't really sell a product there, who would be interested in what?
If you had for example an account in the web dev niche, selling products would be sooo much easier, or any other specific niche.
Most people selling well on Twitter usually do one of these things: (or all of them)
- have a pinned tweet leading to a landing page with a valuable freebie (like a niche-relevant eBook) -> collecting emails to later sell real related products
- pinned tweet leading to a niche relevant product you yourself created (works best after you established some sort of credibility (like a case study)
- pinned tweet with a niche relevant affiliate product, basically selling someone else's product and hyping it up (niche-relevance and credibility important here as well)
The more you focus down on a niche the better it'll work.
Hope this helps you