The info about getting a free upgrade to 10 Suite is here (after you logged out): https://www.ableton.com/en/shop/live/
On monday I'm gonna ask my colleague how much he paid for the 9 Standard to 9 Suite upgrade, just to confirm, but if I remember correctly, he got his upgrade for 199€ from within the the Ableton shop, where the free Live 10 upgrade is advertised as well.
That doesn't mean it's fair pricing. Why should someone be able to do a "double upgrade" for the same price as others, that are already half way there? There is an option missing in my opinion, because technically you're not buying something new here, but also just upgrading. I would be totally fine for completely new customers to get this special deal but not for upgrades.I'd say this is normal upgrade policy. Just like buying a new whatever version of 9 right now. The grace period works for all things bought from the moment (minus x days?) the announcement was made.