It's definitely possible to make money from Adfly. This is one of the best url shortening services that pays to share their links. There are other websites of the same kind. But Adfly is the most popular one.
Since you are asking if it is possible to make money with Adfly or not, my answer would be YES. But you must understand that it will take pretty long time to spread your links all over the internet so that you can get thousands of clicks everyday.
This is what makes this process a little difficult. But their business is legitimate and it's NOT definitely a scam. So you can definitely try Adfly.
Apart from the common method of earning with Adfly, there is a different way to use it to make money. It is by using Adfly advertising system which pretty powerful and can get you thousands of visitors to your ads in no time and it's cheap.
This is what makes a profitable choice to promote affiliate products. I have personally used it and made some money. Hopefully you can do the same too. To know how it's possible, you may read How to Make $100 Per Day Or More Money With Adfly?
Please understand that Adfly is not the only way to make money online. But if you only interested in Adfly, you should think out of the box.
It takes time to make good income here, but definitely not impossible.