We don't compete on the raw number of apps available.
The point isn't to have the most apps on a page. It's to make a page that works well for people and has software they want.
Everyone has a different set of smaller apps they like and supporting all the auxillary software people use would not be worth the effort. Our goal is to take care of the common 90% of apps that most people use.
The curated selection of apps on Ninite is often praised by users since it's not overwhelming and pretty much impossible to pick a bad app.
The selection on Ninite may be too big now. We frequently get requests for apps that are on the page already.