Well, from amazonaws.com, there are so many requests for wp-login.php!

And then all the off-brand scraping companies use amazonaws.com.

What do you mean by off-brand scraping? You mean search engines that you haven't heard of, or copyright violating orgs?

Some AWS visitors:

Cliqzbot, VidibleScraper/1.0, CheckMarkNetwork, CCBot/2.0 (http://commoncrawl.org/faq/), linkdexbot/2.2; +http://www.linkdex.com/bots/

That last one is a "SEO platform".