After their companies have sucked up all the non-poisoned data for their proprietary AI, they burn the bridges and salt the earth and pull up the ladders by poisoning the data, so open source AI harms people by making mistakes, so then they can say I told you so. Great plan.

That, and the interaction data is priceless and only they have access to it. That's the real goldmine and the thing that will eventually allow them to do a complete rugpull.