I think you are overestimating how much they spend compared to Kellogs, Home Depot, Verizon, Walmart, Car companies, etc. Those big players spend so much money

I think you are overestimating how much they spend compared to Kellogs, Home Depot, Verizon, Walmart, Car companies, etc. Those big players spend so much money. If the funding river dried up then sure, sooner if there smaller ad-tech might be at risk, but the big dollars will stay put.