(Personally though I don't see anything wrong with corporations using the technology.)
I can make a “Linux Enterprise Alliance” with those companies and it wouldn’t necessarily have any influence on Linux or Linus.
I hope everyone else also shares this belief, this is how we create belief systems that outlive their subjects and may go on to float freely among platonic solids and spherical cows in vacuum, forever.
And ethereum is very much new. While I personally think it will exist for a little longer, because there is now real money behind it, I think you are right on that generic point ( if I understood your argument correctly ).
It's apt that you bring up another leader, whose ostensible independence from big-money-driven agendas went up in smoke with his initial refusal, then embarrassed acceptance of the CoC that was peremptorily imposed on the Linux project.
Ethereum and the crypto space are at a crossroads for sure. You have chains like Monero on the one side, many in the Ethereum community walking a tight rope trying to balance grassroots free software development with mass adoption, and on the opposite end of the spectrum you get stuff like Solana, the venture capital bro chain.
By May 2017, the nonprofit organization (Enterprise Ethereum Alliance) had 116 enterprise members, including ConsenSys, CME Group, Cornell University's research group, Toyota Research Institute, Samsung SDS, Microsoft, Intel, J. P. Morgan, Cooley LLP, Merck KGaA, DTCC, Deloitte, Accenture, Banco Santander, BNY Mellon, ING, and National Bank of Canada. By July 2017, there were over 150 members in the alliance, including MasterCard, Cisco Systems, Sberbank, and Scotiabank.
https://en.wikipedia.org/wiki/Ethereum