Filing accounts: £15. An online form will ask you for your balance sheet summary only unless you are very large.
One off registration:£65
Annual confirmation statement:£34
So depends on your perspective I suppose.
You have to keep accounts if a business even if not incorporated. A company has to keep accounts if it has any assets (e.g. a domain) or any financial transactions (e.g. paying for hosting)
You will also probably have to file a tax return. You have to keep a register of shareholders.
In fact if definitely not making a profit a standard ltd might be simpler (or maybe a company limited by guarantee) then a CIC as all a CIC does it add restrictions and extra regulation https://assets.publishing.service.gov.uk/media/5a7b800640f0b...
Indeed, so this cost is not relevant to the decision to set up a CIC or not
We are not talking about a business here. The whole problem is that these are things that people are doing as essentially voluntary work.
What your saying would be true in a different context, but this is not business. I do not know whether you find it hard to grasp that some people will put a lot of effort into something for motives other than profit.