The first 5 seconds of looking at your page filled my head with 'This is just a page of shit that I'm not interested in'. It was not clear that I can participate in creating the list. your join now button is virtually invisible to passing users.

I have to click an 'about' page to find out what the site does. this is way too much effort. this needs to be splashed all over the front page.

Once I understand what it is, it's not as good as my existing bookmarking sites. Struggling to see where the USP is.

My gut feeling is that you might be able to get it to work if you work in the niches - people into baking would rather join a dedicated cake site than something that is as general as this. Buy 10 niche domain names and work in the communities they target. Makes SEO a damn site easier too.

Hope this helps!