Doesn't really ruin the experience imo. For example, with Tetris 99 if you're more of a casual gamer you can just appreciate the main fun of Tetris 99 with your order of the online membership, but they give enough to those who are willing to pay a little bit extra so that those players don't get too upset of the free experience some people can just enjoy. Basically, Nintendo can just slap on a few more modes, maybe make themes and icons one can only get by paying for the full experience and I think it can essentially be a Tetris 99 clone with both free elements (included with NSO membership) and a one time pay experience. I'm not saying I wouldn't pay for the game, but I think that Nintendo shouldn't force people to pay for this, especially when they already gave off a free vibe for it.