The simplest way to avoid this is to just set caps on what can be farmed. Its not like there isn’t precedent for this, JP/VP/Conquest all comes to mind.
With a hard limit to what can be farmed every week, people can farm however they want, and adjustments can be made to outlier sources of IP without permanently kneecapping the vast majority of the playerbase going forward.
Why they just continue to cut everyone loose right out of the gate, knowing that exploits will be found and abused, is something that will never make sense to me.