In summary, Opera does proxying and caching for its mobile browser. The article does very little to tell us why that's 'valuable' or indeed a secret.
Yes it does. Basically it says that opera intends to strip out ads from the pages it serves and replace them with new ads. Which new ads? Opera will simply auction the space to the highest bidder. Obviously this will only work for ads that go through its servers, but apparently it controls a large proportion of the mobile proxying/caching market. Sounds nice in theory, not sure whether it will hold up in practice. No…
Opera will NOT strip out ads from pages.
What Opera will do is to let the owner of the page choose to serve ads to mobile browsers through Opera's ad network.
So any ads from Opera on a site will be because the owner of the site requested them.