But, I think that solely basing whether PLR content is useful or not, on it's usefulness as content for ranking in search engines... is somewhat short-sighted.
As far as duplicate content being an issue goes... if duplicate content was an issue, then surely syndicated content would also be. It's not that the content is duplicate content that's the issue... it's trying to use the content as is, to rank in the search engines that's the issue.
Think about it, would you try to rank in Google using syndicated content? I doubt it. You most likely used the syndicated content because you thought it contained useful information.
I still think that PLR content can be useful. Think beyond using just using it as content for your site or blog to rank in search engines.
If you use PLR content in your newsletters or eBook or presentations or video etc... then the fact that it's duplicate content is not really an issue. Here, the reader is only concerned with reading something useful. Here, the usefulness of the PLR content is dependent on the quality of the content, not the fact that it's PLR content.
But, I'm curious to know what you think? Do you think PLR content is still useful? If you still use PLR content, what are some of the ways you use it?