You can stack Microsoft 365 subscriptions bought on Amazon and elsewhere for up to 5 years (I believe is still the case, may be only 3) as long as they're bought at the same place, which would explain the "classic".
I'm decidedly not a fan, but since Microsoft 365 subscriptions can often be found for less than Microsofts price on places like Amazon and Amazon's Woot, among others, fairly regularly, and since this is the first price hike in 12 years, I'll probably just keep paying, though I have about 20 months left in mine (I bought multiple years at $45 a year on sale).
But also remember Google Just did the same thing, raised the price of Google Enterprise by $3 a user per month and included Gemini, but there was no article from TH on that...