Question for reddit growers that use VAs

For example, you pay 12$ for each made up account with 2500 karma, but the dude working for u knows the details of the reddit account and using your proxy on your multiaccount can grow 5 and sell it and you're fucked. Do you guys prevent this kinda frauds or is it all based on trust? If there were any kinda cases like that would like to know how it ended for you

Give him access to a device that you own and make the proxy work only on that machine, then you are going to screen record each working session.