@peekpoke The official amazon apis require an API key, every calibre user would need to get their own api key. That is too painful, at least for me to maintain. The default metadata plugins need to work out of the box, with no need for configuration.
But certainly, if it turns out that I cannot make the plugin work, then it's fine for a new plugin to be written using the API, rather like the existing isbndb one.
@davidfor Possibly, but I doubt it. If that were the case defeating it would be fairly esay for determined scrapers and moreover, defeating it would actually greatly increase load on the servers. Bit of a footgun strategy
