1 - Anti Bot Energy System:
hello given the fact that bots exploit any source of energy we can have a little system like a gym, where we use the equipment and gain energy doing manual workout tasks
of course not a 3d system but something similar into the pixels world.
2 - Anti Bot Captcha:
this system its a bit more efficient at controlling bots while doing repetitive tasks and also it could integrate little rewards as the example i will upload.
the mechanics are simple: with a RNG for each click action we trigger a pop-up screen with a random generated captcha selector with few key points, 1 random images at random sizes it could be X amount of different sizes, 2 random positions and grades, 3 random target images from the same group, 4 random positions on the given square. or pop-up
for a clear view of this please see my uploaded vid https://imgur.com/a/MYd46su