I highly doubt either of them are going to start doing anything more explicit than they've already done between Passes/BrandArmy and it'll almost certainly be agency run too. At the very least, Passes prices are outrageous so even if they're doing the exact same stuff it'll probably at least be a bit cheaper on OF. They must have gotten a good contract to make the jump.
Also, Cassie's IG just posted a similar countdown clock post so guess that's official.