Thanks. I only subscribed to Sunday Ticket last year, not actual You Tube TV. I never got an email to resubscribe. So I went to the site as you said but saw no offers. I went into my subscriptions and saw that it was going to automatically renew in August for $449 a year. So I canceled my subscription. Now if I go to renew, I do get the $100 off as just a Sunday Ticket subscriber. So, if I click renew it's $349 a year just for that ($100 off) until May 16.
Funny - if I did nothing, I would have been billed $449 in August. But since I canceled, I now can get it for $349. That's a pretty crappy way to treat subscribers, but this is Alphabet / Google after all.