i Guess You try the service and IF You Not Happy You just Move on.
Why would I try a service which I dont trust in the first place? 
Would you like to go to your local grocery shop even if know that the person is a scam artist?Quote
why You Trust websites like shapeshift?
Who said I trust them?Quote
First You tried, Trust is always problem
Its not my problem princess. You have to show that your service is trustworthy then only people will try it. Its your idea so you have to defend it. 