Among of the proposals I participate in, there are several I consider myself experienced enough. They are "...Language and Usage" sites, if that matters.
In addition to the limit of 5 questions, I can think of much more example questions which not only clearly define the topic of these sites, but also represent interesting linguistic problems about the respective languages.
I also want to encourage the subscribers to submit good questions (and gain reputation), even if they did not yet think of these problems.
Is it prohibited if I raised a new discussion listing possible questions so that the others picked them up and posted as these questions were theirs? Like this:
Dear followers, please feel free submitting questions from this list
(I will remove them as soon as I see them submitted)
* Question 1
* Question 2