I always get a little irritated, perhaps irrationally so, when I find another "open" project that uses a new or obscure content licensing scheme. In this case, they are using ones from the "Open Database" family, of which I am not familiar.

Can someone clarify what, if any, advantages for consumers/users this has over one of the Creative Commons content licenses? If there is a code aspect to it, then please similarly explain the advantage it has over one of the BSD, MIT, Apache, or A/GPL-compatible licenses.

License proliferation has been a real pain of late (past few years) and has muddied the waters significantly whereas many of these above-mentioned ones have largely stood the test of time and already serve a huge swath of the content world.