I was reading J onathan Swartz’s blog and saw this video with MySQL CEO Marten Mickos mentions that MySQL has about 50,000 downloads per day of which 1 in 1000 of them end up paying MySQL money.

…Let’s also say that of that 1800 users 10% of them share their experience with others that’s 657,000 users a year, so let’s cut that in half to be on the safe side, 328,500.