2. This has very little to do with ad revenue. Google is always tweaking the algorithms that feed the results page. This does not give any new precedence to paid advertisers at all.
Basically they want you to bring your site into the 21st century. I see no real issue here. Responsive sites that are designed well (IE, not slashdot mobile), can be useful, and you can always request the full desktop site (if the site honors that request). Content and formatting do not exist independently of each other. Do you want some gopher sites in your search results?
CAUTION: Please wait until noise has receded before checking your mail.
I received three invites this week from scammers. rather than ignore, I accept, wait for the bait then report. Two sent fake steam community links that were typosquatting malware, I did not investigate further as I was not near a test box and did not want a drive by infection. One sent a bit.ly link to a trojan downloader. When I put it in my test system, it promptly installed cryptowall3. Personally I am all for reasonable measures to curtail these douches. $5 seems reasonable to me.