I do not think that limiting a person to 1 or 2 trades a week is really a good idea, especially right now when there are not that many chickens laying. Yeah, some things seem to stall the thread a bit, but there are some breeds that are snapped up almost instantly (marans, seramas, hamburgs, probably others I have missed) and I would like to see more of.
The swap is a bit slow, so why limit things more? It will pick up better when more people's chickens start laying. I know I will be up for more trading when I have more to offer, but when I have them available, those Serama eggs sure go quick!