At the moment we are communicating with ICO listing websites where ratings are honest and not paid like on most. We can get listed on plenty of websites, but there is no point as there will be no feedback or any traffic coming our way. Putting some badges with ratings on our website doesn't work for us unless those websites are trusted.
If you know any good ICO listing websites that do proper reviews please let us know.
Thanks
Some make money of premium listings, others by providing advisory or other ICO related services and the trusted ones are charging a decent amount of money for banners as well.
To answer your question, how they will make money is something that they should've thought about when starting the particular website.
We will never pay for ratings, if it gets to a point when all ratings are paid, we simply won't have our ICO rated.