I've never heard of 'helper' either and I've followed Q posts since the beginning. I don't buy that post at all.
Q speaks for himself...ha hasn't sanctioned any surrogates that I am aware of.
Q has also told us no outside comms. I take that to mean no comms outside of 8kun...and no comms that aren't signed Q.
I think we should infer "with his trip code" rather than literally "with a Q at the bottom," as there are several of the former that don't qualify "with a Q at the bottom," e.g., Q drops 4941 and 4914.