Personally I dont think thats too unreasonable to bump up price for short termers, I paid for one month at that price to check it out without having to committ. There was one month back then that had an enormous amount of sport in it. I think it was Wimbledon and AB rugby tests (2 or 3 in that month). And there was Conon McGregor fighting Floyd too ! (Extra payment of course) But I consider I got great value.
And then a few months later I signed up for a year. Everyones a winner.