Okay, since this seems like a dead end to me with some people liking the trade chat while some don't I propose something different.
I haven't considered the option to toggle the trade chat and effectively filter advertisement. I wouldn't really be happy as a seller with the server filtering out my clientele. On many other servers/media sites you are given this option after donating to compensate for the loss. While meepcraft can't compensate the sellers, I still think it would be a good idea to make /ttoggle a VIP perk leaving /gtoggle for everyone.
Now I hope /ttoggle is not a perk yet, haha. Alright, please consider my new suggestion otherwise feel free to close this thread.