Regarding the second helping issue. I think it should be relegated to the last day of the swap and/or seeds people have lots of.
For example, I have so many mixed yellow marigolds, purple morning glories, etc that I could give anyone as much as they want - within reason, of course! I am already giving lots of these in the regular pack anyway.
On "special" seeds that I have a very limited quantity, such as the tropicana canna, I offered less seeds per pack. I think it would be unfair for one person to request multiple packs of such items. Many are from newly released plants that few people are offering seeds for trade. Hopefully, the following year, more people will be growing the "new" or "unusual" cultivars and more will be available.
As for people "watching" the swap, I bet some of the people watching the swap are wishing they joined! IMO, one should be aware that anything typed in an internet forum could be "watched." That is why it is so hard to find cannabis seeds ... kidding....only kidding....I may already be on a DEA watch list for buying so many zippie bags at Walmart!
