 As messages pointing to one particular web site would quickly get blocked by spam filters, RX Limited would open up new sites.Initially the new domains were purchased individually from domain sellers such as GoDaddy, until RX Limited set up its own domain seller, ABSystems, allowing RX Limited to spawn new domains on a much larger scale.By 2012, LegitScript estimated that more than half the rogue online pharmacies in the world were registered through ABSystems.