The big incumbents fund a free personal tier by aggressively pushing anyone who looks like a business onto a paid plan. To do that they watch your sessions — connection frequency, session length, how many machines, whether a pattern “looks” commercial — and when a heuristic trips, the free session is throttled or cut. The heuristic has no idea whether you're a sysadmin or a person helping a parent print a boarding pass. It guesses, and it guesses conservatively, because a false “commercial” flag costs them nothing and a missed one costs them a sale.
Scry does not run that heuristic. From the product contract: “Free is never time-limited or session-throttled.” There is no session-pattern classifier, no 60-second timer, no reconnect penalty, no appeal form. A free Scry session ends when you close it.