For starters, I'd love my support request to actually get responded to. To this day (one month later), the support request is still opened. The issue was fixed, however those who were affected received a canned respond. I'm sure thousands of paying customers would not have been aware they were over charged.
"We discovered that your February invoice # was not calculated correctly beacuse of an issue with our usage data system. We have not charged your credit card while we've been investigating and repairing the issue. We will run automatic transactions within the next two business days to collect on your February charges. You can see your corrected invoice on the dashboard:
https://dashboard.heroku.com/account