The numbers say that 4chan has been at a pretty consistent level of popularity since 2009. The popularity of alt chans has grown, even though it's impossible to say how much exactly. Cracky wouldn't be as popular now because she wouldn't be "the first". She probably wouldn't even make the mistake of posting herself on an imageboard. She would do it on Twitter, Instagram, Tumblr or [insert hot new site that I haven't heard of yet] and only a few people outside her social circle would take notice. They would forget about her within a week.