So here is the evidence:
- A public bot capable of automatic undercutting exists
- Tracking Aesthete's gear reveals that 24/7 undercutting exists by random sampling.
- Multiple eyewitness accounts (read the comments:
https://www.reddit.com/r/ffxiv/comme...games_economy/,
https://www.reddit.com/r/ffxiv/comme...ut_of_control/)
Short of actually linking to said bot I'm not sure what more evidence you want. If you're curious you can do it yourself,
as many players before you have done. Instead of believing that dozens of crafters have done their homework and rigorously investigated this, you choose to be a contrarian for no good reason.
Finally, if you do track the market board 24/7 every 5 minutes (shared with a few friends), and see regular undercuts, unless you believe that humans do so on a regular basis, the only likely conclusion is that it's market botting. Of course it's possible for a human to do this but it's incredibly unlikely for it to be sustained over a long period of time. If you don't believe so, randomly check for 20 minutes every day at random times. The statistical likelihood that there's no botting vanishes to zero rapidly. I'm not going to waste my time explaining basic statistics and mathematics to you.