Unless I've missed something
These people are idiots, there is no way that anyone running commercial computing is going to use a database that is waaaay open to SQL injection attacks (indeed anyone who processes a card transaction would be specifically prohibited from using this database by the card companies).
Not offering Windows support because 'Mircosoft is irelivent to the future of software development" gives them away as FOSS zelots, again someone anyone with a large infrastructure isn't going to trust. Also, almost anyone with a large infrastructure is going to have a shitload of Windows servers.
The OSes supported gives this away as Toytown, Fedora, not Redhat, Solaris Express rather than proper Solaris and Mac OSX. An odd section of consumer OSes.
The final nail in the coffin is the name, would you install something called Drizzle? Maybe in America where (AFAIK) it doesn't have the grey, misty, weedy rain implications, but the fact that they couldn't be arsed to look up the proposed name for their database in a dictionary suggests a lack of attention to detail.