Yes. Games with 100% skill don’t tend to have great long term retention. The only exception are games that have PvP Multiplayer at its core (ex. LoL). But overall a game of heavy skill is much, much harder to monetize. Stats and Luck are much easier to sell and control as a game designer. Generally, selling “skill” usually comes in the form of “hints” (which never does well), characters/heroes/cards (which puts heavy stress on content) or can feel like Pay to Win mechanics. The most successful f2p games focus on mechanics that blend the right amount of Skill with Luck and/or Stats.

I haven’t played Miniclip games in depth, but if they do matchmake simply based on XP, and XP is just a factor of how many games you have played, then that is a bad matchmaking system. Games of heavier skill like Pool will have players of heavy skill differences. your matchmaking must account for this. It must allow both player types (low skill and high skill) to be challenged and feel like they can win. I would always recommend a more Elo based system like crowns in CoC/Clash Royale. It creates nice dynamics in a multiplayer game. However an Elo system alone needs a baseline of progression to allow lower-skilled players to feel continual progress. They can’t feel the game is a sinking sand of progress — win one battle, lose two. So Stats or XP has to come into play to feel like a player that spends more time in the game can gain advantage over others. This allows the lower skilled players to play often and still feel progress.