"So, if you had a robot that wrote a thousand comments with links to your web site. Google is likely to categorize your web site as spam."
If this was true, I could just put my competitor's website links in the comments and have their site labeled as spam. They would just be ignored.
SteemIt is now using rel="noopener noreferrer" in links. They do this to prevent cross-site scripting attacks. Unfortunately, the noreferrer directive means that your links never show up in analytic reports.
Links from SteemIt posts get the PR associated with the posts. I think google is good at recognizing the spam links dropped by robots as they usually have the same text in each post.
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