I watched a few videos where the game looked like a game show board, but the one I found on my usual site looks like a simple 2D pyramid. Are these the same game with different skins, or do the rules and max wins change between developers like BGaming, Spribe, and Smartsoft?

There are actually several developers including Spribe, BGaming, and Turbo Games, and they all have slightly different features and betting limits. This website compares the different attributes, such as the max win being x5000 in some versions or the betting range starting at 0.1. For example, the Spribe version of the Plinko Casino Game allows you to choose colored balls for different multipliers, whereas others might focus more on auto-betting features and hotkeys.