The toll is one multiple choice question on your topic. Four answers, one right. No timer, no pressure, and the quiz screen is deliberately calm. The banter waits until you have won.
The screen goes full gold: TOLL PAID, plus the minutes you just earned. You will also see your running tally for the day, something like “4 in a row today · 40 min converted,” and often a one line explanation of the answer, because the entire point is that some of this sticks.
From there, two buttons:
One correct answer buys one fresh block of your allowance. Tolls do not stack, so there is no farming questions at breakfast to scroll free all evening. Each gate is its own toll.
Nothing dramatic. “Not quite. Here’s another.” A different question appears and you try again, as many times as you need. The full no lockout policy is here.