While some may be enraged by an act so amazingly small, imperceptibly minuscule and transcendently trivial as bidding, I'm not. It gives me more space to update on my elderly enterprises and a most generous return.
You can bid freely and without penalty on C3 state corporation or on the corporations belonging to the Gamemaster Corporations. But if you cannot resist the curious temptation to bid on a player owned corporation, you can bid on mine. But be sure to read what the blue rectangle which states:
<!-Quote-!>Quote:The price paid for corporations, owned by another player, is increased with 50B SC$ cost if the highest bid is below 200B SC$. The price is increased with 100B SC$ cost if the highest bid exceeds 200B SC$.<!-/Quote-!>
But one does have to wonder why bid on player owned corporations, when this penalty is place makes it (economically) irrational. The price to copy the parameters which make a corporation successful come at zero and the transaction costs to acquire the knowledge are simple, quick and most fairly cheap - transaction costs include such invaluable commodities such as time, and that's why it isn't free.
I'll write something with a bit of a more stabbing and twisting motion next time.
With the penalty in place, and regarding only player corporations, it only makes sense to bid on corporation with a market value below 50 billions. Above that, well, if you want to take into account the supplies, the upgrades, the profit... lets just say that in the whole, it is not rewarding (vide transaction costs). I really don't recommend bidding on corporations, not because of what others think or might do - blocking a corporation under bidding from taking out loans is fairly easy -, but because it quite simply doesn't payoff and there are more profitable alternatives.
I can think of a easy way to turn this scenario upside down... Positive for everyone, actually.