Freelancer Clarification

[pbtenchi]

Sorry if it's explained somewhere else or if this is the wrong place to put this (It's my first time using the wiki), but I need some clarification on the freelancer class.

Whenever a feature improves with leveling, you pay half of its price. Does gaining extra uses count as improving? For instance, if I bought a stamina pool, would I have to spend 20 to buy it followed by an additional 10 each level?

Uses per day doesn't count. Only actual improvements

Thank you!