I don't think any official news has been published regarding this one. Anyway did you read the article completely? The article itself gives us proof that the crypto ads have not been banned yet and neither they are thinking to do so. Just check the snapshot from the article writer and you will see the mail conversation with google says that they have not banned any ads and there is issue with platform for displaying the ads at all.
Also, crypto currency is big market for the platform like Google because Crypto currency projects invest heavily on the ads and thus google benefit a lot from that.
I am very sure this is part of effort made by those who want bitcoin dead by any means possible. It obvious, this was the hand work of those who hate crypto and they try use big organization like Google to get in their plans, but i think it won't work,because, as you rightly observed, Google actually get their benefits on adds so, what is the rational behind the plan ban?