They're an impressive feat of engineering.
They produce huge amount of electricity with more reliability than land-based ones.
They're however being built for Oil :P
https://oilprice.com/Alternative-Energy/Renewable-Energy/Wind-Megaprojects-Are-Coming-Online-Across-The-Globe.html
Oil platforms need huge amount of energy too. Finding a cheaper source of energy when needed makes sense BUT does seem pretty ironic though lol.
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From @sames