[x86a]

To be fair, I doubt bandwidth has ever been a significant cost driver for CAs

[jiggawatts]

Greed has been the cost driver, which is why plugging "*.domain.com" into the subject field instead of "domain.com" costs 10x more money.

DigiCert for example is owned by private venture capitalists.

They expect as much rent-seeking as possible to get a return on their investment.