According to a recent study, the internet is approaching capacity and more than $55 billion or more than 70 % than what is planned by the ISPs may be required for additional capacity. http://eConsumersearch.com/news.html These costs are going to be passed on to users.. More wireless devices are coming on line.. more fees for email ?? bandwidth usage etc?? This can affect marketing on the web, infact all users may be affected???
Don't believe in stuff like that, there's always room for expansion especially with terabytes and beyond becomming more common.
It may fill up with spam, but how can it be "full"? It's going to increase in popularity and make our lives more convenient - we're gonna make it more efficient too - It's never going to fill up
The "internet" is impossible to fill up. What the heck are you talking about? Even by year 3000 this won't be filled. Sites will expire, and people will replace them with a new one.