Tech stocks with all the hype are second only to crypto in terms of how easy and fast are to sell (hence BTC dropped and now tech stocks IMHO).
Btw, I was too young to fully remember, but wasn't the year before the dot com crash also full of IPOs?
And thinking about it it makes sense since the decision to pay the outrageous rates for an ad during the Superbowl must be driven by strong emotions (confidence or desperation). In this case, considering there's no clear moat for any of the big players, I believe it's the latter.