[icebraining]

Of course there is. Bandwidth isn't infinite, there's certainly congestion and maintenance required to upkeep and upgrade routers and cables.

[nxsynonym]

yes but that is from general use, not tied to specific websites.

If total traffic increases those costs go up, not if a higher percentage of users access specific sites.

That would be like charging trucks more to cross a certain bridge because there are more cars on the freeway two towns over.