"I figured that even if the article is off by 2 or even 3 orders of magnitude, I would still be doing very well should I develop something similar."
Here's your problem. Firstly: lame motivation, in that there's no reason for a player to give a crap about this motivation. It doesn't relate to the experience of the game at all, only to 'players give me money'.
More importantly, you're fundamentally misunderstanding how internet markets work. It's always a 'viral' power-law thing where the one you're getting excited about, the incredibly profitable game or the PewDiePie youtuber etc, is unattainable. You can't have that, you're not already them, and there IS no 'second or third order of magnitude', those are also extremely tiny groups and it takes decades of work and impressive existing name recognition to even get there.
There is no correlation between merit and reward, except that 'a set level of merit is required just to get you into the zone where the power-law guys operate'. Past that point it's essentially arbitrary and governed by rules you can't affect. You don't get to turn into a PewDiePie or a slither.io, there already is one.
My advice as somebody who's in the top 3.5% of all Patreon worldwide (which is surprisingly nonlucrative, further making my point) is this: look to what you're already doing in life. For me, it's audio hacking, and so my Patreon around that 'succeeded' because I came into it with literally ten years of doing business and being known by the general audio-plugin public, with an existing brand identity and a dedicated fanbase. That got me earnings roughly a third or a quarter of what direct sales was getting me (but: much more steady and predictable and growing, which has done me a world of good).
If you haven't already been publically making games for ten years or so, the last thing you should do is look at slither.io and go 'I should do that and make a tenth/hundredth of the money. How hard could it be?'
You're fundamentally misunderstanding how internet economics work. On the internet, if you try to get 1000th as much as slither.io by making something half as good and hoping for the best, you get NOTHING.