Saya, at least they're not Avex level yet where regular versions might never make it onto the regular channel.
They've only been posting promotional versions on their channels for a while now, with the "official" MV only available on the DVD's.
Right now it's only minimal differences, but in the future who knows....
But yeah I hope they don't start doing that thing where they only upload like half of it on to their main channels. E-girls does that and it's annoying AKB does that, but at least they upload the full one a couple months later, unlike other groups.