ya, whatevs there is always a difference between a mining operation and getting the mining equip straight from factories with no markup and mining yourself. mining companies can compete but not on the same level as the manufacturer/miner
I completely agree and that's why I've always stuck with companies that make their own chips. That 'rule' has served me quite well. I'm not advocating for Peta-mine here. I'm just stating that others may be investing in a large IPO that will demand people sell other positions in order to invest.
However...
Asicminer:
Currently having difficulty maintaining running blades. In fact, in friedcat's most recent post he even mentioned that one of the reasons they aren't posting an actual hashing meter is because it would require them to perform more maintenance (leading one to assume they are laxed on the maintenance and letting people see that would be a problem). This is further exacerbated by mysterious network issues that cause them to be unable to process all available transactions (losing fee's) and leading to orphaned blocks (highest orphaned block count of any mining pool). These same 'network issues' are frequently friedcat's excuse as to why hashing seems to be going offline. How hard is it to hire quality sys admins in China anyway?
Labcoin:
Small time player with questionable trust issues. Their stock price is already over priced considering the % of the network they will be able to realistically maintain being late to the game on old technology with limited funding.
ActiveMining:
Complete silence from them is leading investors to lose confidence. If you look at what they are offering and compare it to their competition, it's hard to see how they will make shareholders any profit with a 16GH, power hungry chip that realistically won't be out until mid November.
Given the state of available securities it is easy to see why people might be open to investment in a company like Peta-Mine.
If you think Labcoin is overpriced then you haven't done the maths.
In 2 weeks it will have 3-4 Th/s online, so let's say about 0.5-1% of the network hash rate. 0.5% of the network hash rate will produce mining dividends of 252 BTC per difficulty round. With 10,000,000 Labcoin shares and 30% of profits being reinvested, that gives 0.00001764 BTC per share per difficulty round. For the price of 1 AM share, you can buy about 1000 Labcoin shares, which would provide 0.01764 BTC per difficulty round.
A month later it will have about 50 Th/s, which will be between 5-8% of the network. At 5% of the network and 30% of profits being reinvested, each share will get 0.00017640 BTC per difficulty round. Those same 1000 shares as before, which currently cost about the same as 1 AM share, would produce 0.17640 BTC per difficulty round.