Like many others I use EDHREC for card ideas when building decks. This got me thinking - does it essentially reinforce itself?

Often times I pick many of recommended cards that others have chosen with a given commander - which in turn reinforces those cards as synergistic cards for that particular commander. Note: I build using moxfield (which I believe is used as a data source for EDHREC). More recently I've been using scryfall as an additional resource for deckbuliding, and I was really surprised how many cards that work well with a particular commander / archetype are not listed on EDHREC.

Don't get me wrong, I still think EDHREC is a wonderful tool, but now I wonder if it's essentially narrowing down the cards that people consider when building EDH decks due to it's reinforcement loops.

Thoughts?