A client of ours received via Google Search Console a manual penalty notification I've never seen before:
The new GSC manual penalty for not running AdWords ads
The most recent list of manual penalties we know of so far was published on SEL by Kaspar Szymanski, and does't mention the one we spotted. We thus believe it's a new one.
The notice is something puzzling, as it seems to corroborate what until now we have discarded as an SEO myth. In the past Matt Cutts denied investing in AdWords could improve organic search results, but here the thing is stated from another perspective: while no organic boost seems to be guaranteed, Google actively encourages businesses investing in PPC campaigns.
Did you too stumble upon the new manual penalty notification? Let us know!