The WSJ reported this morning that many startups (and distrubingly, many HN-backed startups) are using fuzzy math when it comes to reporting financials. Generally, they're using non-GAAP measures that they "feel" better reflects their "growth" and "income potential" rather than actual financial measures that everyone else uses.

I wouldn't be surprised if the "10,000+" businesses included prospective businesses, companies that tested Zenefits out without committing to it, and former customers.