[forgotusername]

It's just an alternative for someone already offering to work for free – I'm certainly not about to write a business plan around it.

My use case is simply that I like my own comments/SMS/tweets/etc. archived and searchable, as it's an easy way of keeping track of stuff with zero effort. In the case of HN it would also serve to avoid the common situation where I miss a reply until hours after the replyer's lunch break ended.