I still don't see many arguments about advertising when it comes to TLS. I can't deploy TLS across my sites without losing a huge amount of ad inventory due to

I still don't see many arguments about advertising when it comes to TLS. I can't deploy TLS across my sites without losing a huge amount of ad inventory due to cross-site request policies (no HTTP content from HTTPS domains). AFAIK, Google is the only network actively working on having HTTPS-supported ads. The value of the ads drops significantly as the auction pressure from all the HTTP ads is gone, meaning any sites that rely on ad revenue can not afford to use TLS.