Salesforce.com has some ridiculous domain names: work.com, data.com, force.com, do.com, database.com, desk.com, social.com, etc.
I've never seen a corporation go after so many and so generic domain names... I'm assuming GP just meant that "clipboard.com" is yet another trophy domain name on their shelf.
Not sure what there is to elaborate on. It's a 9 character, properly spelled dictionary word, one that resonates highly with anyone who has ever cut-and-pasted something on a computer.