[jjcm]

I wouldn't say the calling to the site is based on monetary gain. By comparison, he'd make that same amount if he rented each of those rooms for $670/month (a pretty cheap price for California) - and it'd require a lot less work. I think the bigger call to it is that you can meet new people in an interesting context. It's a fun thing to do, in my opinion.

[webwright]

Having a boarder is VERY different than having people drop in for a night here and there.

He could rent a room for $700 a month or $90/night. The latter works out better assuming he can rent it for 8 nights per month AND allows him to keep in available for friends/family who are coming into town, etc. I think the "fun" aspect of it is definitely part of it for some folks, but I'd wager it's less than you think.

[chr15]

But he couldn't find anyone to rent the rooms. AirBnB fixes that inefficiency and fixed that problem for him.