Because they're advertised as games, and the developers running them don't officially support full convertibility of the in-game credits to
and from fiat. Even then lawyers are looking into the extent to which securities laws and anti-money-laundering laws apply to virtual games, for instance "AML Magazine - Only in the Virtual World"
http://www.amlmagazine.com.au/amlwr/_assets/main/lib90004/only%20in%20the%20virtual%20world_issue%2031_dec11.pdfYou know, you can break securities laws and anti-money-laundering laws by trading in commodities or other valuable items too. For instance it's been suspected that many of the sky-high prices seen in the international fine-art market, and the plethora of anonymous buyers, are actually due to the ability to store and transfer wealth through art, or even straight-up money laundering schemes.
No court is going to believe Bitcoins aren't valuable if them being valuable serves the purposes of a securities fraud investigation.
Most of the GLBSE businesses were worth at most a few thousand bucks. It isn't worth the time of anyone to prosecute anything. Boys-night-out poker games move more money than most GLBSE IPOs. Money laundering? What money? Sorry, I don't believe this is a legitimate threat. We'll have to wait until Nefario tells us what is happening. In the meantime, the next generations of decentralized exchanges will evolve and that will be the end of threats from government bullies.
Well, you're absolutely right for the most part, and that's also why online MMORGs don't receive more attention. But keep in mind that people working in these bureaucracies want to show that they're relevant and on the cutting edge of whatever they do - going after new tech can be one way to do that. Also, this comes after Pirate's ponzi has collapsed, and the allegations about how much money was lost in that scam - half a million USD - are for an amount large enough to warrant an official investigation. There is another incentive too: testing the waters. Pirate involved enough money to make
some sort of investigation worthwhile, and the people doing that investigation may very well figure it'd be worth going all the way to get some practice before an even bigger scam comes along. It'd also be quite conceivable to give the investigation to a new, junior, officer to both give them some experience, and evaluate their performance before something important comes along.
Heck, I once probably experienced this myself while waiting in the international departure lounge in a country for which I had citizenship for, waiting for a direct flight to a different country for which I also had citizenship for. I was stopped by two officers for what they said was a random customs interview. One officer looked to be in his 50's or 60's, and his name tag said something along the lines of "senior" or whatever, and the other one looked like he was 18 or so. I gave them both my passports and my ticket, obviously showing that neither country could prevent me from entering, and the younger officer proceeded to grill me for the next ten or fifteen minutes about my trip in the exact same way you get entering a country when they're not sure if they're going to let you in.
After that was over, I overheard the older officer discussing his interviewing technique with the younger one...