You will also spend 3,6 times more money while living in San Francisco.

The price is that high for a reason: sf has a lot to offer. Networking opportunities, job market liquidity (see all the ONSITE SF posts in this very thread), etc. Perhaps not 3.6 more, but it definitely beats a cabin in the Siberian tundra.

By correcting for rent, you give people that advantage for free. That's why it's unfair.

The way to deal with their unfairness is to refuse to work for them (unless you're in SF!)

Trust me on that I am working with GitLab from past 6 months and I have never regretted a day. GitLab is always open for ideas and this is also work in progress. How many companies have you seen declaring their compensation framework :)

Not many, but disclosing compensation isn't worth $100k/yr to me.