How many questions LearningHub will serve depends on what the family holds. There are two quite different arrangements, and which one applies decides whether waiting until tomorrow helps.
Without a bundle or a class
An account with no prep bundle and no current class enrolment gets a limited number of free LearningHub questions to try the hub out. That allowance is one off. It is counted across the whole life of the account and it does not refill, so once it is spent, waiting changes nothing. The screen says so plainly: the wall reads that the free questions are used up and offers the bundles page.
Once the free allowance is gone, the rest of LearningHub closes with it, including Insights, Bookmarks, Badges, the Shop and the Leaderboard. Practice tests and the dashboard stay open.
With a bundle or a class
A prep bundle or a current in person class enrolment gives a daily allowance instead. When it is used up the screen reads that practice is done for today, and it starts again the next day. Nothing is lost and nothing needs to be bought again. Where a family holds more than one of these at once, the most generous allowance applies.
What counts against it
Starting a new question counts. Going back into a question already open does not, so a student can leave the screen and come back to the same question without paying for it twice. Questions Testy sets during a conversation are counted against Testy's own allowance, not this one.
Where the figures are
The exact allowance for an account is shown on the screen when it runs out, and the bundles page lists what each bundle includes.