Since chemBlink is open source, why do you still charge a fee?
chemBlink’s primary purpose is to provide free information of products to the public. Its primary product promotion program, Standard Linking, is also free of charge. For additional services such as premium links, a small fee is charged to cover maintenance costs such as servers, licenses, and workforce. chemBlink’s Information Policy (1) Direct interaction between buyers and suppliers through chemBlink If there is a button on a product page, it can be used to directly contact with the suppliers of that product. Otherwise, visitors may click on the link located under the heading List of Suppliers to open the supplier listing page, from where an individual supplier can be contacted through online mail or by phone / fax.
