what is this swap about?
you set up a 'shop' with crafted items (and some craft supplies) for the rest of the swap participants to shop from, and you get to 'buy' stuff from other shops in this swap. no real currency is involved...you start with 3 loaner points in your account, earn points from selling items, and buy stuff with the points you have. at the end of the swap, you will need to have 3 points in your account (i.e. the original loaner points)
here's a link to the last round for this swap (i.e. sts winter market 2014)