As stated in the article, for now at least, they wont be.

They also promised there’ll never be ads on WhatsApp. Whatever statement Meta makes isn’t worth the paper it’s printed on.

Non-algorithmic feeds are a good thing. That sums up my feelings.

When that changes, or it gets plastered in ads, my feelings will be "well that was good while it lasted". Until then, I'm choosing not to doom say about it.