Correct. This was essentially 'parking picks' and i believe has been banned after Sydney pulled it last year with the Blakey situation.If GWS trade you pick 6 they cannot trade it back in. I think they should be doing something like this though. No point holding on to pick 6 and have it swallowed by a Green bid.
The AFL is set to close the academy draft loophole which Sydney exploited to "park" picks, in a move that is likely to affect the Giants this year.