The hard part about stickies is that there can only be 4.
Sometimes information is consolidated into one and posted to maximize a slot.
Opinion stickies don't last nearly as long as informational stickies.
For anyone seeking to have something posted as a sticky with longevity, the best solution is to list information for and against a position, have a bold face main idea title, and include source links in the message. Consolidating much information or multiple announcements into one sticky also helps.
Avoiding saying anything too extreme unless a medley of opinions helps too.