Peter Reinhardt has a great talk about that. You need to understand the feedback that you receive and sometimes is better kill fast your ideas to move on. If it is a product or a community doesn't matter, if your growth is flat you still didn´t hit the market that you need so you could eventually successful monetize your company.
People that really love what you do will "spread the word" and bring new people.
I'd say their community is their primary _asset_. All products are (ought to be?) built around an advantageous asset, whether it is exclusive data or a novel workflow or special insight.
But you design, engineer, build, and test a product, not a community. Though we do try.
Hmm that's a pretty ephemeral "asset"... and it's an asset that is directly tied to your ability to pull funding. Even if you technically don't directly mold the community, it doesn't do you any favors to try and think of something else as your "product" just because you're uncomfortable with the definition.