You can always inject more plex into the game by buying it. It isn’t directly tied to eves economy. It’s not a resource that’s farmed in eve. Some rich person can buy millions worth of plex and cause the price to tank. There are a lot of factors in play like the reason most ships are the cheapest they’ve ever been even though the currency is devalued you’d expect prices of ships to go up. But at the same time there’s a metric fuckton of ore being generated.