A notable one being related to the MMO Final Fantasy XI, with the "Maat's cap" item being created by Square Enix to praise a player who achieved the maximal level on every job available in the game. Which back then needed hundreds of days of slow and frustrating grind.
He says he saves multiple times (he mentions that he usually does it "at least three times") which I thought would mean that he uses multiple different saves but instead he seems to only have one single save that he overwrites multiple times. So in the end he just increases the wear of the underlying flash and has no backup. Not to mention that it increases the change of having a save being interrupted in case of power failure. That's bold.
Frankly the fact that he doesn't appear to have even a single backup save on what appears to be an otherwise empty memory card makes me question the authenticity of that whole ordeal. On the other hand I guess I shouldn't presume to understand the mindset of somebody who's willing to go through something like this.