Hi,
the intended behavior of the plugin is to have an automated system that unsticks other posts and makes only the post you’re saving stick to the top.
Having any number of sticky posts (kind of a maximum number of sticky posts allowed) defies that automation logic, since ideally one would like to choose which posts to stick, rather than resort on the current post and the two most recent sticky posts after that.
No the answer would be no, but thanks for the idea, though! I might think of a way of implementing this if other people see the worth in this.