Let's say I want to purchase 5g of weed at 0.1 BTC on sunday morning. At the time of my purchase, BTC is at 300 euros. What happens if :
I do not finalize early, wait a week for the delivery, then release the funds when the BTC is now at €400. I mean : do I still pay 0.1 BTC, so 10% of now €400, so €40, (so... NOT €30) ? Or is the corresponding amount of BTCs recalculated when I release escrow so that I always pay the €/U$D value related to the BTC value at the time of the transaction ?
I do Finalize Early on sunday morning, time of purchase. When I receive (w00t!) my order one week later, BTC is now at €400. So I paid €30 with what is now valued €40 (aka 0,1 BTC), but indeed still payed only €30 "at the time of purchase" (as BMR likes to state). Do I understand this right ? - Differently : I purchase for 0,1BTC = €30, do NOT FE, then a week later the BTC has plummeted at €150 : if I release now, do I still pay 0,1 BTC, that now is equal to about 15 euros, or am I "forced" to release about 0,2 BTC, so €30 as valued "at the time of purchase" ?
In short, how to deal on DNMs with BTC in time of big hi & lows on the BTC front ?
You pay for the item at market value of BTC at time of transaction either way.