Who will pay to protect tech giants from rising seas?

This article is Activism masquerading as Journalism.

They are there a very high income company that can or cannot afford that protection for them or their neighbor communities, but what about everywhere else, where there are no tech giant with that possibility?

They are making the wrong question. Or some of the companies/entities behind (either causing, financing disinformation campaings, or getting "donations" from them) have to support that cost, or should be done by the government (they didn't take any compromise regarding climate for almost 30 years) or the people will have to deal with that in their own way.

And in the last case, the companies are in the same situation.

And the worst part is that the problem won't be a couple of feet of sea level rise, in the last month we've seen plenty of floods by extreme weather alone. And not sure how will end the sea level at the end of the decade with the positive feedback on climate, and high temperatures around Greenland.

It would probably be easier for Facebook or Google to just reboot their headquarters, in multiple offices, wherever their labor pool migrates when their homes get flooded. For the most part it's just people at desks in buildings, which can be set up anywhere there is electricity.

These companies would take a freebie if municipalities decided to mitigate flooding on their behalf, but it wouldn't end up being an existential issue for them to just move elsewhere if things became untenable.

The same way any other infrastructure is paid for?

It also pretty much affects anywhere with significant amounts of water. The recent floods in Zhengzhou were pretty bad, and that was hundreds of km inland.