It hope he has a liquidity event, validating the accelerating pace of business development and shortening of the product life-cycle of today. And when I say "today", I mean of one actual day.
Seriously, it would be awesome if he made out with some cash from this idea. What he's offering is: a cool name, a cool idea (a validated-to-some-extent idea), an implementation, a (nascent) network effect, and publicity in the relevant community.
Of course it seems ridiculous because it is only a day's worth. But that's no real argument against it; it may be an argument against the sale price being very high, but it's no argument against it being worth something.
There is however one very limiting argument against it - the ease of duplication:
If you believed this was a great opportunity, how much would it cost you to catch up? Almost nothing, and you might prefer to start fresh anyway. If it had been going for 3 months, and had 3 months worth of brand recognition, network effect and improvement of implementation, that would be worth something. I don't know how much, but it would take 3 months (approx) to duplicate. And if you didn't buy it, you might never catch up - so not just a few month's worth, but some proportion of a life-time's worth.