Nintendo, while aggressively litigious, do so to maintain the value and exclusivity of their IP.
Their games also never go on sale, and all sell really well over time, unlike many releases from other publishers.
The result is that Nintendo are able to release a solid cadence of high quality, first party games free of other forms of aggressive monetisation, maintaining the value of the games as art.
Ok they are probably making a ton of money with that too, in my bubble these games are so unpopular, barely saw people playing or talking about the TCG or the MOBA one, the Yu-gi-oh one is so more popular here that is not even a competition.