The models aren't the hardest part, it's the data tagging, labeling, classification, validation. Especially with ingestion of new data if you hope to keep yourself up to date. Wikipedia is perhaps something of an analogue here and it's chock full of misinformation. Open source is going to be equally biased by activists and other interest groups, just in different ways.
Since alternative tech platforms are often destroyed, it seems unlikely a legitimate rival product with actual investment that has controversial outputs would be allowed to continue operations.