The raw numbers of sign-ups and revenue are interesting as a broad health check, but they don't really provide enough context to give you meaningful feedback of what your chances of continued growth are like.

The stuff I'd be more interesting is data points like: Of the people who sign-up, how many of them are still active in a month? How many of the people who are active in a month become paid users? How many of the paid users are still paying after 6 months? How important is this product to the paid users? Do they regularly refer their friends? How many people would sign up for your premium membership at $10/month? $20/month?

If people are churning left and right, then I'd be less excited than if all the paying customers loved it, but it just hasn't been marketed broadly enough.