Actually it might be an underestimation! I heard that number quoted in a YouTube video but can't find it anymore. YouTube, Twitter, and Facebook have had a purge of any QAnon related channels and they're probably going to have another purge. Q did warn this was going to happen. But as digital soldiers, when one falls another takes it's place. They doxed QMap.pub which is now off line but lots of other aggregate sight shave sprung up.
Please note there is a difference between Q and QAnon decoders. FYI Q has never advocated violence. He/she always says "enjoy the show". The action is from POTUS and the Q team not civvies.
As for numbers, here's an article on traffic to the 8Kun website.
A forum previously known for hosting mass shooters now gets most of its referral traffic from QAnon websites, data shows
QAnon decoders have migrated to other platforms as it's predicted YouTube, Twitter and Facebook are going to go down for such blatant censorship and interference with the US elections.
I bet the Kremlin and GCHQ monitor Q posts!
It seems as Q gains momentum, the DS is trying to shut it down. There was a time when Q was not discussed, but now some members of congress are supporters, then the question was asked of POTUS, and now there is a hit piece on Wikipedia. Not bad for howling-at-Moon conspiracy theory!