They don't do anything, yet. They are angling for uncompensated market research, but the submission had little content and so isn't earning attention from HN.
I'm sorry. In http://news.ycombinator.com/item?id=2881127 you advocated measuring interest (probably the most important part of market research) before building anything, and to all appearances you aren't currently offering any services at http://momment.com/, so I assumed you actually had not built anything. What has your team done, and can we see it?
Don't expand on what memories are (we know that) expand on what "a new way" means.