I don't think this holds up when real-world money enters the equation. I don't think this can be accurately descriped as player optimization or class specialization if people are paying real money to skip it.
> they can make more gold per hour via other activities their character has access to
If this was actually true, no real-world money would be entering the system, because all of the players would be making enough gold in-game via those other activities to pay for the logs. If they're being forced to spend real-world money, then the other activities they're engaged with are not giving them enough gold to sustainably fund themselves in-game.
The problem isn't having an in-game economy, in-game economies are great. The problem is people paying to get rid of gameplay. People who do that are signaling very clearly that they believe there is monetary value in removing a section of gameplay from the game. Designers should pay attention to that signal.
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I don't doubt that there are people legitimately having fun playing Runecraft. But it can't be everyone, or else people would not pay $10 to remove less than a day's worth of grind.
There are a ton of problems bundled up in this sentence, but I'm not sure I have time to unpack all of them.
But this is not an attitude that I think a game designer should ever have. I don't think we should be building experiences that boil down to teaching players that spending money is the equivalent of overcoming a challenge, I think players should be extremely suspicious of any game or experience that has that attitude towards challenge. Spending money is not the same thing as achieving something or earning a reward, I think it's really bad for us to encourage that kind of equivalency in a player's mind.
Meh, it's a free country and games like Runescape are a known quantity that players can choose. I would say that if you want to change minds then make your case, but clearly you don't have the time to do that.
Unfortunately, in the scope of Runescape, this misses the point in a big way. Runescape has a robust economy where every action can be measured in gold and experience per hour (when played efficiently). Someone might be buying magic logs for gold because cutting them down is a poor choice for them from an opportunity cost perspective (i.e. they can make more gold per hour via other activities their character has access to).
Zooming out, the system is actually incredible if you get a chance to analyze it a bit more. For the hardest of the hardcore players, there's a resource called CrystalMathLabs[0] that shows exactly how much time and gold it costs to max your character. And the devs are constantly optimizing new content around these "max efficiency" rates.
0: https://crystalmathlabs.com/tracker/suppliescalc.php