netmeg - 3:14 pm on Mar 9, 2013 (gmt 0)
I noticed a common element: all the sites that have suffered are wordpress based.
I wouldn't put too much weight on that; probably most new sites that are published are WordPress based. It's free, it's easy, and it caught on like wildfire.
epmaniac - Google doesn't know (or care) that you "invented a microniche" I think focusing on that might distract you from figuring out what is going on.
I'm pretty sure I read somewhere (but unfortunately can't remember where) that Google is okay with ranking scraped content higher than original content if the scraper has more trust and authority, and maybe if it's a brand. Which means, for example, if Amazon suddenly decides to swipe my content, until I issue a DMCA, I'm SOL.
So if someone is scraping your content, you can't wait for Google to sort it out - you need to issue DMCAs everywhere that it's appropriate, and while you're at it, you should study those scrapers sites and see if you can figure out WHY Google thinks they are more authoritative than you are. And then you need to make appropriate changes to your site to boost YOUR authority and trust.