When you host Jira yourself, the monthly subscription pays for Software + Software updates. When Atlassian hosts it for you, you're paying for Software + Software Updates + Service (hosting). When you hosted yourself, a team gets blasted for not monitoring it or updating it correctly. When Atlassian fails to do it (and charges for it) then they get the heat.

All that to say, I don't think it's a weird phenomenon, it's just you're realizing that you're paying someone else for something that's not delivered on.