Why does Bethesda treat sales numbers as top secret? I can see no clear advantage to doing so, and actually some disadvantage - can't get bragging rights if you do hit a home run. I do not see how it gives any advantage, and as for competition, as far as RPGs are concerned, it is no longer an issue: there are so few good RPGs released in the last few years that there really is no competition for the consumers $$.
In the last few years, I can count the number of good RPGs on my fingers: Bioshock 1/2, Dragon Age 1/2, Mass Effect 1/2, Witcher 2, Oblivion, Fallout3/N.V.
I could think of 1 more reason, which would actually have a financial benefit to Bethesda, but since that would be illegal, I left it out of the poll
If you can think of more reasons, let me know
Can you elaborate on why you feel this way?
Bethesda has issued numerous press releases about sales for various titles over the years, pretty much in line with what every other publisher does.
If you are asking why public websites and blogs that publish videogame retail sales don't have information about PC digital download sales, that has nothing to do with Bethesda. Those sites get their information from retailers and retail sales reports issued by companies like Nielsen and NPD.
Digital sales platforms like Valve, Gamersgate, D2D, etc., simply do not provide those websites with their private sales information. This is the same for games they sell from all of their publisher clients, not only Bethesda.