By [Townsend's] estimate, making one game a year that performs like A Dark Room would make it possible for him to quit his day job, but he’s unsure whether this whole experience was just a fluke.
It's worded in a way that makes it ambiguous whether he means that as a pure hypothetical, or something like "I made about a year's worth of income from A Dark Room, and if that were repeatable I could quit my day job".
By [Townsend's] estimate, making one game a year that performs like A Dark Room would make it possible for him to quit his day job, but he’s unsure whether this whole experience was just a fluke.
It's worded in a way that makes it ambiguous whether he means that as a pure hypothetical, or something like "I made about a year's worth of income from A Dark Room, and if that were repeatable I could quit my day job".