Here's an anecdote about what happens when you design a product in the opposite way. I own https://www.executeprogram.com , which has interactive in-browser courses on various software development technologies. Currently they all cover languages, more or less: TypeScript, SQL, various JS topics, regexes. (Disclosure: it costs money after you finish your 16th lesson.) Almost all (maybe literally all) of our competitor…
You want to stop them from playing through too much of the game's content and burning themselves out on it. So you lock them out with a timer, forcing them to come back later. Then you reward them for coming back every day. This encourages them to turn the game into a habit and integrate it into their routine.
Looks to me like you've accidentally stumbled onto one of the very tactics games use to turn people into addicts.