For the most part, the people who request the Cheap Bastard Plan don't have much in the way of traffic, so it's not particularly expensive to service them. Every once in a while I'll get a request from somebody who's a bit "cheap"'er than normal, asking for an upgrade after posting a comment to an online forum or blog entry, or even just a tweet. But for the most part people tend to have nice things to say about the product, and proceed to say them.
One possible application might be recurring revenue stats (growth, churn, etc). There are some solutions for this but they all depend on certain billing providers. Would be nice if you could just upload a .csv file of all your transactions, tag the columns, and get a nice report.
Out of curiosity does anyone know of a similar service for Google Cloud Storage? Really bums me out that they don't break out bandwidth per bucket.
6 months: Regularly covering server expenses (which were ~$50-100/month at that point).
18 months: Would have paid for me to live nicely on the beach in Thailand.
30 months: Would cover my rent (and nothing else) at a nice apartment in a major city.
40 months: Passed the monthly take-home pay from my first (non-software) Engineering job out of college.
60 months: About what I'd have been making had I stuck with that first job out of college for 10 years.
80 months: Roughly a Senior Dev salary anywhere but the Bay Area.
As I noted a few years back for the first version of this list, this is for a SaaS subscription product that I built with the explicit goal of having a low-level income stream that I didn't have to put much time into. Early on, there were periods where I worked 80 hours or more per month to get the infrastructure ticking away to my satisfaction. These days, it requires maybe six hours of my attention each month.
This year, though, I've been back to full speed (meaning high single digit hours per week) building out and releasing a bunch of new features.
[1] https://www.s3stat.com/