Firstly, Peter, excellent response above. Really made me take a step back and rethink.
Until now..
They charge a 30 BTC fee?
Their largest stock by a mile is their own stock. This just makes them a huge Ponzi scheme no?
All this talk of failing stocks on havelock, when was the last time mpex listed a successful stock?
The 30 btc lets you trade directly on the exchange. You can get that lowered by having a referral. You can also use a broker and entirely avoid paying that fee (for example, you could use CoinBr). I seem to remember Havelock saying they charge 1 btc per month to have a an asset listed on their exchange. Even without the referral discount, that 30 btc fee for registering with MPEx is only 2.5 years of monthly fees at Havelock. If you do not think your company will last more than two years, maybe you should not be selling stock in it and should secure a loan instead.
First, define what you mean by successful? Better question is when was the last time mpex listed an unsuccessful stock? If you look at Havelock, almost nothing is above the IPO price. The stocks on MPEx are pretty much all up from where they started.