Spamming remains economically viable because advertisers have no operating costs beyond the management of their mailing lists, and it is difficult to hold senders accountable for their mass mailings. Because the barrier to entry is so low, spammers are numerous, and the volume of unsolicited mail has become very high. In the year 2011, the estimated figure for spam messages is around seven trillion. The costs, such as lost productivity and fraud, are borne by the public and by Internet service providers, which have been forced to add extra capacity to cope with the deluge. Spamming has been the subject of legislation in many jurisdictions.
Full page pop ups are becoming more common, where people don't know how to exit the pop up encouraging them to leave the site they were visiting, if this was for a sale, it then brings down the numbers of people buying online. Also pop ups can put people off putting their details in online thinking if someone can get this to come up then they could be able to find the baking details etc. Overall spam pop ups and viruses are a very negative effect for the online shopping and advertising as any could be false or a trick.


