Hi @Non0,
Welcome to the community 
Thanks for raising this. It is a challenge for how the Keeper economy might evolve to avoid a small number of Keepers winning the majority of Jobs.
This may also be worth posting in https://gov.yearn.finance/c/projects/keep3r/20.
Some potential ecosystem solutions could be to throttle the frequency of keepers (a Keeper that wins a job can’t do work for X amount of time), or a cap on gas to reduce front-running.
As for the frequency of autotasks, currently the minimum is set to one minute. There could be potential to increase this frequency, though this comes with higher infrastructure costs, some of which may need to be passed on to users.
Keeper and Defender are both evolving, and the team are watching closely. Input and feedback is very welcome. 