The AMP Cache is an option that you can opt in to. The wordpress plugin by default opts in. The author said as much.
The problem isn't that Google "steals" traffic in the sense it's going against the wishes of the site publisher, but that the author didn't know what he was buying in to and thus was surprised.
There is the other thing which is the AMP Cache is probably more local and faster than your site. Small sites usually dont use CDNs so there it is.
> No. By using the AMP format, content producers are making the content in AMP files available to be cached by third parties. For example, Google products use the Google AMP Cache to serve AMP content as fast as possible.
The problem isn't that Google "steals" traffic in the sense it's going against the wishes of the site publisher, but that the author didn't know what he was buying in to and thus was surprised.
There is the other thing which is the AMP Cache is probably more local and faster than your site. Small sites usually dont use CDNs so there it is.