Edit the point shop plugin/addon (if possible) to add a box opening cooldown just as the gambling machine has a cooldown.It also confuses them into thinking it is a prop. A system for a grace period to sell removed models then deletes them automatically so people can not appear as errors.
To new players, this issue can be a turn-off and make them think they need some game they do not want to get to see the props that should already be there. Alternatively, add some useful, common commands in the MOTD followed by and brief summary of what they can do.
It has culling bugs, an abundance of nonsolid brushes that props can submerge inside of, and could be touched up via brushwork and bug fixing. Whether by the creator or someone else (maybe me if he is trusting).
