A lot of these bugs are used to test for fake user agents. Even sophisticated bots may not know that their fake user agent’s V8 version had a jit or rounding bu

A lot of these bugs are used to test for fake user agents. Even sophisticated bots may not know that their fake user agent’s V8 version had a jit or rounding bug. If you watch change logs you can spot this stuff. Most of these are obvious and sophisticated fraudsters are well beyond that. I could say it’s defensible but a big reason bots are a problem is the way the entire online ad system is still the Wild West. There is no regulation so I wouldn’t be surprised if a majority of the bots were just competitors. It has to be tempting to use that black hat fraud defense knowledge against your competitors, especially if there is so little regulation or transparency.