The beauty of open source is you can always fork the previous version. I don't see how it's anymore of a bait and switch than a vendor raising the price of a product.
That's often called bait and switch if a subscription price is hiked significantly.
My naive interoperation of this comment section says there were quite a few people making money on this work, without helping them pay their bills.
Related, it's often not viable to give away something for free.