Originally Posted by urka
What are Static IP Addresses used for in reselling? Are they important for the customers?
MMhosting.com offers them in their reseller plans but I don't know anything of their functionality.
There are multiple uses for having a static IP address that are very beneficial for users. As others have noted, you need one when you want SSL, when you want to create custom name servers, for linking purposes avoiding penalities on the same IP C Classes blocks, blacklists, etc.
Originally Posted by gearworx
How so? The IP netblock owner is still belongs to the hosting company, not the reseller since the IP address can't be re-delegated (SWIP) to the reseller.
There really isn't any anonymity to assigning an IP address since anyone with a dnsstuff.com account or even SSH shell account can run a WHOIS on the IP address and quickly determine the parent company.
Of course, the hosting company can take measures to change the IP block ownership to something other than their name but it still doesn't belong to the reseller.
As hzSari has stated, you can accomplish this with a static IP by using rDNS for anonymity. This does depend on the reseller web hosting provider if they do this or not and would recommend checking with them.