Revenue & Expenses 2 Years After Starting My Web Business: UniversityTutor.com

1) Don't graph dissimilar things on the same graph. If you absolutely must, to make a point of how they correlate with each other, do not re-use the same axis. There is no reason Revenue ($) should ever reuse an axis with Contacts (number of).

2) Don't graph anything you can't get actionable data out of. For example, revenue per day in a subscription business is going to be dominated by the anniversary dates for existing accounts. Is that useful to know? No, that is noise. Condense it into revenue per month and then you have a useful top-level overview of whether your efforts are bearing fruit or not.

3) One line on one graph. At most, two. Anything more turns into a solid wall of noise. (You may find it occasionally useful to have a solid wall of noise in presentations to other people. Don't put it on your dashboard! Then you're only fooling yourself!)

Separate strategic commentary: Mass profusion of subdomains is not a good idea for SEO purposes. (I assume this happened because it was in fashion two years ago. This is one of the dangers of chasing the new hotness in SEO techniques... though I don't remember that one ever being a good idea at less than black-hat scales.)

I'd put the blog on the same domain and, if not interested in maintaining it, hire somebody to continue writing content for me. (I need to take my own advice here, come to think of it, as the BCC-specific blog doesn't get content updates nearly frequently enough.)

Start A/B testing. (You knew I was going to say that, right?) One obvious candidate would be adding a featured flag to the subscribing tutors, with the goal of seeing whether it increased a) contacts to them and b) subscription rates. (As soon as you have an answer to Question A it becomes a marketing point: people who pay us $10 a month get 63% more contacts and more than $200 of extra revenue! Dude, its a total no brainer!)