The amount of points you recieve seems to have something to do with the rarity of the items you buy. Not sure what the correlation is yet. Items bought for BP, RP, or Dukka Coins do NOT add to the balance of your points. Neither (as I found out after I thought I had a great idea) do things bought in the millionaire lodge. Apparently it's only the MAIN SHOPS that give you points. This is all I know so far...will update when and if I figure anything else out.