- Charging a very minor fee for order creation and cancellation... minimal enough to not affect normal users, but significant enough to add cost to running a bot 24/7 with constant order updates. Something like 0.00001 maybe. Perhaps allow the first 20 order updates per day to be free, to not impact the average user at all.
Why should you enable bots first, and then fight them so hard this way... nonsense.
The 4 significant digit change is much better and settles the question, IMO.