More likely that their core database hit some scaling limit and fell over. Their status page talks constantly about them working with their "upstream database provider" (presumably AWS) to find a fix.
My guess. They use AWS hosted Postgresql and autovacuuming fell permanently behind without them noticing, and can't keep up with organic growth, and they can't scale vertically because they already maxed that out before. So they have to do crash migrations of data off their core DB which is why it's taking so long.
My guess. They use AWS hosted Postgresql and autovacuuming fell permanently behind without them noticing, and can't keep up with organic growth, and they can't scale vertically because they already maxed that out before. So they have to do crash migrations of data off their core DB which is why it's taking so long.