That could turn into an arms race of the target companies trying to detect when it's a fake account versus a real one, and the analysis service trying to make t

That could turn into an arms race of the target companies trying to detect when it's a fake account versus a real one, and the analysis service trying to make the accounts seem more real. Of course, if it became public that the target companies were trying to dodge the analysis, that could be damaging to them. Then again, automated accounts would likely be against the TOS. The analysis service could work by watching the traffic of real people who download a browser extension, but then privacy from _them_ becomes an issue. Perhaps some kind of distributed data-collection system could be created, where an extension will analyze your own traffic, strip out as much personally identifiable information (PII) as possible / as you'd like, and then submit that to a central repository for aggregation or further collective analysis.