I have, but it's been a while and I didn't think too deeply on it. IIRC Bowser can steal your stars, but I'm not sure if that's only in the later games (my little sister was really into the one that came with the gamecube microphone) and maybe not the N64 ones.

Also, Mario Party hot take: despite all the memeing, I maintain that "skill" of a sort is absolutely a factor in Mario Party, similar to Mario Kart. It's certainly not going to be a competitive e-sport, but winning the most mini-games not only lets you have more money to buy stars and the other miscellaneous bullshit that's available on the map, it outright gives you an extra star at the end of the game. In games I played with my younger siblings I consistently won, which if it was down to random chance and pure bullshit wouldn't be the case.