Dear vendors,
Sending your "We're making changes to your account" emails at 4:50pm on Friday is universally seen as a dick move. It's like you want it overlooked.
Normally I understand the desire to be overlooked. But in this case, you're improving account security by asking people to move to SSH keys and whitelisted IP ranges. THAT'S A GOOD THING and you should NOT try to hide it.
Sincerely,
People with a fucking brain