Popular Steam monitoring service SteamDB added Artifact right after game was pushed to Steam. And numbers we can see are quite funny: 25 players online tops and about 10 players is average online. So we can confirm previous rumors about low online and problems finding opponent. But also SteamDB showed high patching activity: updates are rolling out every several hours. So we can definetly tell that game is under active construction, and developers are getting ready to the next (and the hardest one) phase of testing: fixing balance. To do so, they have to invite more testers in order to gather some statistics and fix balance.
Here you can see monitoring info. As we can see, counter stopped working recently, Valve fixed this to prevent speculations like this one 😉