Good for TV shows especially. Also Axel are customs friendly and normally ship a good week or so before the actual release date.
The text below is take direct from the site.
Sales are awesome. So we thought wed have another one: Helium Days sale, where every item in the store weighs 100 grams.
During the sale, the shipping cost is only 100 grams per item (the minimum weight) for all orders (including preorders) regardless of how much the item weighs.
If you have previously ordered item that ships during the sale you will be refunded the difference for shipping as a voucher on your AxelMusic account.
Time to seek out those items 200 grams and over. (Hint: Criterion titles, PS3 games, TV-Shows, Collectors Edition-titles and many more).