In a sense, the tower was meant to give him everything for free anyway. But that would just be bland. It would also make the existence of tower points useless.
So he needed that. But that also didn't mean the tower had to be strict with him. If a Heaven-grade skill book was selling for less than a million tower points, it could only mean the tower didn't take much.
Or perhaps tower points, in a way, were equivalent to billions of spirit stones. But he wasn't sure if that was the point. So he could only focus on what he could get for free first before spending money.
[The master is lying to me, but I will make an exception. Of course, I will not hand you ten items for free. There should be a catch. Do you want to know?]
"Fire away, Gaia." Kent knew for a fact the tower was meant to make him stronger. So whatever it did, it wasn't an excuse—it was a way to make him grow.