A couple times recently (on this question and this question in particular) I've seen a Meta post that was 'modified' by the Community. When I open the question, I don't see any changes, just a notice saying
bumped to the homepage by Community♦ 1 hour ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Does anyone know what exactly causes a question to be 'bumped'? My guess is it is somehow related to the number of answers with no votes, comments, or accepts. Does this happen on the main site too, or just on Meta?