The PlayStation, released in late 1995 in the West, was a magical console in a magical era. One of the magical things that made it so magical was the fact that it used cheap and thin CD-ROMs instead of expensive and thick cartridges. While this does have several downsides, it has one serious upside:
They were able to affordably press and include a "demo disc" for PlayStation owners with various magazines every month, each containing several playable demos of upcoming games. This truly blew my mind back then and was such a major change from having to invest 36 months of allowances into a single hit-or-miss game for the Nintendo consoles. There was something beautiful about a nice little disc full of digital candy being shrinkwrapped onto a magazine.
While the Saturn also was CD-ROM-based, I can't recall ever seeing a single demo disc for my Saturn besides the one that it shipped with, so the PlayStation was unique in this regard. I remember buying magazines for the sole purpose of getting to play the demos on the demo discs. As a bonus, I got a magazine to read! And for a fraction of the price of the impossibly (to me) expensive new retail games. Hell, even compared to the second-hand full games.
I only ever ended up owning a very small number of actual PS games, and those I got were bought second-hand or after they had hit the far cheaper re-release edition. My major experiences were playing the demos over and over, more as tech demos than me actually caring too much about them being actual video games which I had any interest in "beating".
I can very much imagine that this applied to many others as well, and I'm sure that some were even more extreme than I, and didn't ever buy a single game. Maybe it's difficult to find reliable statistics on this, but I would be very interested in hearing if it's known how many people did or might have done this.
Note that I'm only caring about the original PlayStation -- not the PS2 or later.