I think the limit to number of daily postings by any individual to
the list is just a wee bit low at 5 (which I hit today).

I am on several other lists, and none of these have any such limit.

There are usually only a small number of people who post often (such
as yours turuly), a few who post only occasionally and the majority
lurk without ever posting.

So raising the limit (or removing it) isn't likely to create a flow
akin to a broken Grand Coulee...