Yeah, this has happened a number of times, enough that I'm wary of investing time and energy into using a service that appears to not have any means of making money. Last fall, I evaluated Posterous for my personal blog, but one of the reasons I ended up going with Squarespace instead is because it's a paid service:
http://kylecronin.me/blog/2012/3/13/my-thoughts-on-posterous...