It isn't anything special. Lots of big companies now accept WFH 3 days a week. The other 2 days they arrange company shuttles for those people so it is much easier now.
Your example of $100/month is ridiculous hyperbole. More like $4000 in SF and $2000 in San Jose. If I have to choose between an extra 4h a week driving but saving $500 per week, then I will do it.