Semi-related: If I'm not mistaken, services like Upwork and Fiverr will look at certain metrics for outliers, like repeat business in a particular industry. An

Semi-related: If I'm not mistaken, services like Upwork and Fiverr will look at certain metrics for outliers, like repeat business in a particular industry. And for eBay, I think they’d look into cancelled bids on high-value items and check messaging history. Disclaimer, based on old memories