Things that are built with money (& not by say, intrinsic motivation alone) seem to have a high ratio of (traction) to (resources invested). Not sure if marketing alone can explain that?
Obvious exceptions come to mind , eg the Linux kernel, but even that was massively boosted by commercial interests.
(One other class of exceptions could be tentatively named "winning the zeitgeist lottery")
If you would agree that this phenom exists in the short to mid time frame: without the likelihood of traction, how can intrinsic meaning alone provide motivation?