Better for: Window snapping and FancyZones. If you only want DisplayFusion for the "split screen" feature, Microsoft PowerToys is actually superior. FancyZones allows you to drag windows into complex custom layouts (3-column grids, nested boxes) that DisplayFusion cannot do natively.
Binary Fortress (the developer) frequently gives away DisplayFusion Pro keys to: displayfusion license key free better
If you have a trusted friend who owns DisplayFusion Pro on Steam, Steam Family Sharing allows you to play/use their software on your PC. You share their license effectively. Better for: Window snapping and FancyZones
Searching for a "free better" key implies you want an upgrade without paying. Here is what you actually get when you download a keygen or a "cracked" portable version: displayfusion license key free better