As far as I'm concerned, Miningsweden.se can be moved to the scam/ponzi list, due to pre-selling Antminer S9 units which are not officially confirmed nor announced by Bitmain in any way.

Sources:
Miningsweden: https://www.miningsweden.se/product/mining-sweden-s9-2000gh-shares-ms9-pre-sales/
bct: https://bitcointalk.org/index.php?topic=1472058.0
Bitmain forum: https://enforum.bitmain.com/bbs/topics/3433?page=1