On BTC.CO/LTC Global there's no way for an asset owner to create new shares - it currently has to be done manually by burnside.
Personally as everything I run is either a bond or a fund (a pass-through is really a fund where the assets are 1 share of the underlieing per unit sold) I just created them with an arbitrary huge number of shares: the number authorised doesn't matter (much) practically for bonds/funds, just the number sold. For stocks obviously it's different - but a pass-through to a stock is NOT a stock (shares/units in it have no direct rights in respect of the underlieing asset). Having said that I listed the pass-throughs to BBET and DICE as stocks - because that's how most investors will think of them and their behaviour will seem as though they're stocks in nearly all circumstances.
Looks like namworld follows a similar policy - with 1,000,000 shares created for each of his pass-throughs.
Indeed, it is convenient to leave room to grow. Prevents Burnside from having to constantly update the amount available.
And damn, I hadn't realized you were running the same on LTC-GLOBAL with the exact same names for BBET & DICE.