I have serious reservations about the purchase of this being crowdfunded - for two main reasons:
1. If/when someone buys this, they will want to commercialise it - ie make more money than it does now. That means a lot will change - and the existing users - and maybe the crowd funders - probably won't like a lot of the changes. Look at what happened to UKBF. I used to be a very regular contributor on there up until about 2 years ago. I was on it every day. I don't even know if it still exists!
2. I've sold a few websites for £60k to £150k - which I built from scratch with a lot of blood, sweat and tears - and in most of these cases, the 'new owners' have driven the business into the ground within a couple of years, and lost everything. So, in my experience - there's a big difference between someone building a successful website and someone taking one over, thinking they can sit back and watch the money rolling in. I fear that with crowdfunding, this is even more likely to be the case.
Finally, I've 'invested' (only small amounts) in a couple of other online businesses - Moneydashboard being one. Then, before long, a deal [which you knew nothing about] is done to sell the business to someone else, and somehow the 'investors' get back pennies in the pound.
So, I really think that someone should buy this with their own money. At least that way they get to reap the rewards of their own efforts.
If someone has the time and the money - but not the knowledge, they can always buy in some expertise on a consultancy basis. I do this at £75 per hour - and a few hours can make a big difference. Some of my clients have a few hours and then nothing for a year or more!