[Freak_NL]

Casual visitors not interested in actually joining a website (at that moment) can be of value if you don't actively antagonise them. Saying that you need an account to view the content when someone follows a hyperlink posted somewhere to a Pinterest board means that you will turn away a decent percentage of those visitors with a sour taste about your service and brand. Sure, there is the old adage that there is no such thing as bad attention (any attention, good or bad, builds your 'brand'), but I'm not convinced this works in this case.

To illustrate; literally the first thing that popped in my mind when seeing this topic in the list was “Ah, that silly imageboard you can't view without signing up.”