Could anyone give me tips on how to maximize adf.ly income?
Making something semi-original and completely amazing with appeal to as many people as possible to make it worth it to use the adfly link. Stealing others stuff is a good way to get your AdFly account banned though and everyone hates a person AdFlying everything in posts and videos so don't do any of those.
Start out allowing people to download your product off a regular add-free site, and once it becomes a popular download and you are seen as a reliable source, then switch the link to adfly and then profit.
If you start out with an adfly link and you aren't already popular, you're never going to become popular because people will just get annoyed at you.