The supply of Bitcoin is set by the program and the demand is primarily a function of speculation right now.  In theory, rising prices should encourage more Bitcoin "mining", normalizing the value.  In practice, this is a graph of the value over the course of two months.
 
If any country had a currency that was doing that, their economy would be in complete upheaval.  Now, to be fair, it's still a fairly small and rarely used currency, and it's likely that things will calm down and normalize (the value will either stabilize or crash)  but this underscores that no one controls the value of Bitcoin.  Inflation and deflation are purely a function of supply and demand.  If those things change, for whatever reason, the value changes in very short order.
 
The fact that no one is in control is one of the things that appeals to most Bitcoin proponents. It's also the reason why most skeptics doubt it's ability to ever be a reliable store of value.

Well companies such as Coinbase or Bitpay may have incentive to advertise Bitcoin don't they? Even if it's indirectly.

Either way, I'm only asking if it's been done before I'm not saying hey, let's band together and make a Bitcoin TV commercial.