Video ads are working very good too.
Fivvr can help you to create a professional one.
I know, some people like to advertise into broader audience. Starting from 100,000+.
It depends of your niche of course. If you selling an eBook for $9.99 about how to make recipes, it has no sense to target 19,000 top paid CEO and Managers of the country and pay $9.50 for just one click.
You need to do some due-diligence first and research your potential market. Therefore, you will get the visitors who will actually buy your products or services.
Therefore, always follow the money.