The pull/push of shares was because on Bitfunder all shares receive dividends, so in order for only the outstanding to receive them, he had to pull the wall, de-issue them, pay the dividend, re-issue them and post them again.
Thanks - good to know. This forum really needs a thanks button. Or a bitcoin tip bot. (tho why 150->250k?)
This isn't an AsicMiner thread so I'll limit this to an ActiveMiner comparison. AM is 'established' (for Bitcoin!) so the share has a value beyond the dividend. It's seen as a safe place to store money, has room for more share gains (partly because of this), and will earn an income. ActiveMiner's share price is based upon the risk/reward of the business plan, so future dividend predictions are vital.