Does Trottle module useful for paysite?
 

Does trottle useful to limie bandwidth per user for paysite?

Something like this
http://www.snert.com/Software/mod_throttle/

and this
http://www.topology.org/src/bwshare/README.html

or this one
http://www.steve.org.uk/Software/mod_curb/

Or is there any better way to limit the bandwidth?