Clks.pro is a paid link shortener. It does this by showing ads on its intermediate pages. Each visit you receive on your URLs generates benefits for you. To request payment you must achieve the minimum necessary for the payment method you have chosen.
Working from 2022-08-02 and added from 2022-11-12, Clks.pro link shortener has not yet been included in the main list of shorteners.net. This is because we are not yet analyzing their rates and therefore we can not show them always updated. If you want it that way and you think it's a legit url shortener you can vote for its inclusion using the vote button.