Try Quests to earn cryptoTerra Who Validates The Validators
These are the top 3 validators and they are far from the rest of the validators. I have found that consistency is the most important thing when it comes to validators. As you can see the top validator is doing more validations than anybody else. This means they are also making the most money as well. It also can be seen that the best validator is putting extra money into their validation work, which means either investing in extra machines so they can validate more times and/or they are getting clients as well to let them validate, which has become a big market as well.