Scrum Guide based Scrum on the market
It's a fact, that currently there are a number of different version of Scrum present in the Agile market: Scrum guide based Scrum, somewhat swampy "scrum alliance" scrum, based mostly on apocryphal teaching and older versions of the Scrum guide; and completely separate SAFe Scrum.
So called "Scaled Scrum" presents even wider variety: NEXUS, Scrum of the Scrums, SAFe, LESS and Spotify version(not used by Spotify any more but successfully used by ING bank).
Let asses what is a position of Scrum guide based scrum at this market, without prejudice and salesman optimism...
Scrum guide based Scrum is still widely popular, especially in Europe, but it is worth mentioning that most companies use Scrum rather formally, usually keeping old command-and-control methods and simply calling Product managers "a product owner" and team leader "a scrum master".
The Scrum Alliance version, with own certificates and own approach is definitely more widespread in USA...
SAFe Scrum is considered most popular at the moment, with most big companies opting for it.
On a Scaled Agile side things are as follows in my observation:
NEXUS is rarely used anywhere, and is generally unknown for anyone outside the scrum.org community.
LESS is gaining popularity, mostly because of banks who use it.
Spotify Scrum is getting strong criticism in media, but is still used in many places.
Scrum of the Scrum is used almost everywhere where "Scrum alliance" Scrum is applied. Its worth mentioning that the Jeff Sutherland, another creator of Scrum guide didn't sign for NEXUS, and is supporter of Scrum of the Scrums...
SAF is going strong and kicking.
Any elaboration would be appreciated.