I give you a better suggestion since you want people to deposit BTC and test your system.
Look at this guys:
https://bitcointalk.org/index.php?topic=5140688.0They are paying the users upfront to test their system and you can do the same. Ask the very trusted members in the forum to test your system and give them the required BTC to deposit.
This way users will not need to trust a new business with their own money.
Interesting idea. I'll pitch it to the team.