As of January 1, 2014, the state of Texas (where Mothernode offices and servers reside) required local businesses to charge sales tax on all internet based sales and subscriptions.
Texas State Comptrollers Office
“Whether the sale takes place online or in a store, Texas sellers must collect sales tax on taxable items sold and delivered to Texas locations. A seller is “engaged in business” in this state if they have a Texas outlet, office or location where they take orders for taxable items. Charges for transportation or delivery to a Texas location, both before and after the sale, are considered to be services or expenses connected to the sale and thus taxable. These charges are taxable even if stated separately from the sales price.”