I think AdSense used to warn of possibly lower earnings when switching to HTTPS, because somehow less ads are available over HTTPS. Is that still the case?
Same scenario here (author of the original post): moving from HTTP to HTTPs did hurt my revenue for the first couple of months (I switched 2 years ago), but advertisers seem to have caught up.
For tech-oriented sites, I don't see a difference in revenue for HTTP vs HTTPs sites anymore. In fashion or other markets, that may still be a different deal.
