this is way
I don't think subs is a problem, but prices could be improved significantly. like 10-12$ a month for full access, I am 100% sure over 80% of the free visitors will buy that sub and long term, site will make more money than what it currently is making.
Right now their biggest expenses are storage servers, very fast internet, and a few back and cyber security personnel. Apart from that maybe the rent of wherever their servers are kept. Some other expenses I can see is interconnected fast cpus but that's a one-off and maintainance of them should'nt bee oo expensive. So basically it's not a huge investment but their charges are sky high.
So I really think if their charges were below $15, people would happily buy.