https://bitcointalk.org/index.php?topic=5162419.msg52612005
Sumcoin
https://sumcoinmarketplace.com/ad/sofa-7802/
Sofa - Sumcoin Marketplace
The official Sumcoin Marketplace. Buy, sell, and trade goods and services using Sumcoin (SUM), the world's first index-based cryptocurrency.
sofamarketplace
https://www.sumcoinindex.com/page/faq
Faq | Sumcoin Index
faqindex