2. I believe you that the author is a straightforward person and I don't think there's anything malicious here. Still, it's not a good dataset. It's 250 data points collected in an ad hoc way. A single decision like "do we include PUBG or not" can sway every statistic in here. So I don't think it's a good idea to make any conclusions based on this data.
If you have a better data set on which to make decisions, feel free to share it. People need to make the best decisions they can with the information available to them.
I'd say PUBG data is much too new, in the timescale this looks at.
I'd be inclined to say "ignore World of Warcraft" in anything like this, because it's the biggest outlier ever (No MMO comes close, even 14 years later) - but at least there's tons of data around it.
2. I believe you that the author is a straightforward person and I don't think there's anything malicious here. Still, it's not a good dataset. It's 250 data points collected in an ad hoc way. A single decision like "do we include PUBG or not" can sway every statistic in here. So I don't think it's a good idea to make any conclusions based on this data.