Skill setup

Hi,

Is it possible, instead of having skills set through the UI, to allow my players to buy them?

For example, take Loot Magnet instead of upgrading it through the skill tree, I want to give players the option to buy the max level in my shop or obtain it through cases.

If this is possible, how would I go about setting it up? I’ve tried a few options in my shop plugin, but none of them worked.