4) I personally believe that the GIGAMINING share are now worth zero as (so far anyway) there is no method to sell or transfer them to anyone else
The pending BTC is 3984 for 40,000 shares, so they are at least 3984 / 40,000 = 0,0996 BTC each.
I meant the market value of the contract/shares/bonds themselves assuming you keep them, they are not transferrable, you receive all pending and future BTC payouts (1099 income), ASICs hit the market this coming year, etc.