0.1. BTC for a full member is damn expensive.
Do they have any potential activity?
How is it damn expensive? Seems to be a pretty standard price around here unless you're a tightwad who likes to lowball. Also looking at your last post you seem to have given a loan of 0.1 and taken a Full Member account as collateral so if it was damn expensive not sure why you would loan the very same amount out.
If we compare hero and full member ROI then i think you get ROI your money back after a week or two with full member, but with hero you need more than a month so the price is not expensive 0.1 for a full memeber account