how can you prove that you are trusted enough? there are too many escrow service for free in this forum why would anyone use an no trust escrow that ask for 0.8% fee?
You're definitely right in saying that the escrow market seems pretty much saturated at this stage with many of the big players offering 0% fees. I did a lot of reading on Bitcoin security over the past year and I feel I have good security practices in place but if the 0.8% fee turns out to be too much then I might relaunch the service at a later time with no fee and tips instead.
EDIT: Also one advantage is that I might be able to offer escrow for IPOs/ICOs for a 0.8% fee although this would depend on the complexity of the IPO/ICO (e.g. simple NXT-style IPOs should be no problem).