This isnt unique to Nintendo, definitely. It's sadly the downside to being open and welcome to indie development.
Look at Steam Greenlight. Rock SImulator 2014. That's the tip of the iceberg. It's filled with other crap too.
Now Nintendo has it's "rock simulator" in The Letter.
Only a matter of time before people realise Sony's online store is likely filled with cheap crap too, and it gets its own "rock simulator."
At least Microsoft wont have to worry about this.








