"Exploiting a glitch" sounds like profiting from something that the developers did not intend.
Discovering a new strategy seems to be your own achievement inside a valid/allowed rule construct.
While both feelings can be satisfying, the source of satisfaction is a different one. Therefore -> False.

I can see that. But I also noticed the kind of joy people experience when discovering a strong new strategy.

It does read a lot like 'glee at getting away with something' and less like 'turning the dial to its 100% position'.

Although I can see this changing based on how strong that new strategy is.

Flipping a level 5 expert in Endeavor Deep Sea gets a very different reaction to squeezing the last out of a guild cards combo in Arcs.

I can feel and understand your glee when making a strategy work that does not seem viable or even possible at first glance: Gotcha!
But is this "gotcha" directed against the players or against the game (developers)? That would be the defining distinction for me in this feeling.

I don't know if it has to be directed at someone. I think it's more about the experience of overstepping an assumed boundary of the game.

Much like factions in strongly asymmetric games tend to be described as having 'games breaking' abilities. Not because they actually do so, but because it feels this way due to assumed boundaries of the game.