Gaining trust is paramount to having more clients than will keep patronizing them but it's also good for anyone that have a service on this forum to also build trust since Bitcointalk is the world biggest crypto community.
For any crypto services, it is important to also build trust in a crypto community like this because their are more crypto enthusiastic people here that could need the service and this can also be based on referral due to past jobs that was deliver without any complain. That is how trust is built over a period of time.
It is really a good idea because there are so many scammers in crypto space, so for any service to be successful it needs to be trusted if not that's the end of such service. Bitcointalk is platform with more experience members in crypto related issues. So for any service to be trusted in this platform I believe it depends on the reputation the person behind it has earned in the forum. Sometimes too positive feedback back from trusted members that has petronise the service will definitely be of help in making people to trust such service.Trust is not a one day thing but nothing will help such service more than people being able to trust it.