My thoughts
1. Not having secrets - MITM isn't necessarily conducted by malicious attackers, but that doesn't mean it's bad. Consider for example a company that wants to identify usage behavior and buys traffic data from an ISP. While the data may be anonymized it's still someone's usage. With https, a webmaster is limiting the info those companies can get so instead of being able to run a complete analysis on the type of text a user reads and images they see, over https they could only tell what websites you go to. It's still pretty bad, but not as bad.
2. Cost - I do see the value of cheap hosting on S3 and getting redundancy. I've been hosting servers from the days before AWS existed (I started young) and know one thing - if you can't afford something you probably don't need it.
Why does you $0.06 site need to have a multi node setup? I don't mean to sound like a jerk but if you had the kind of traffic a multi node + DSL site needs you'd probably have the funds to invest in it. It's really not very expensive considering a cup of Starbucks coffee costs 100 times what you currently pay for hosting...
If your content isn't secret why not go with a cheap SNI that can host your certificate and put that behind cloudflare (which is free)?