I wonder if earlier comments on news aggregation sites (like Hacker News, but probably more influentially Reddit) may have changed the practices at some of the press-release recycling services. Maybe they are getting better (although I would still much better like submissions of actual independently reported journalistic stories about science here) because people have been complaining.

Over the years that I have looked at Science Daily it has always provided sources and citations. I don't think there has been any change.