Copycats are usually subtle. But Eco has one that isn't.
twitter.com
twitter.com
Later on he talks about the tag line being the same. If you both have the same features and benefits then the tagline is going to be similar.
The job posts were super obiviously copied. But they talk of copied terms and blog posts. Which seems super odd. Having your legal docs from a source other than a lawyer seems super likely to cause legal disputes you lose. And I couldn't even find a blog on pebbles.us.