That is a fair point, but it still allows an easier entry point. A lot can happen in a month to sell an individual on a project. After having been lead here by BigFryTV I was under the impression that it would be monthly subs. But the truth is that when he covered it they had confirmed the price per month but were still building the subscription plan. Now if we are following the general definition of a Beta: 'Beta' is a standard term to denote a milestone release during production in which game functionality is included and optimised (but may have bugs), game content is finished (but may have some implementation errors), and which is considered nearly complete. This would indicate that now is an excellent time to be drawing some people and building hype. Unless however the content is not there and they are misusing the word "beta" like so many Early Access developers on Steam seem to do. From what I've heard however, the content is there and this appears to be a proper Beta.
So I'll cut straight to the chase here. Why is there no single month sub plan? I can understand wanting a bit more money or perhaps supporting players who only want to play maybe 2-3 days a week. But as someone who is incredibly skeptical of any Dev who operates outside of a distribution platform that has well known purchase security it bothers me that I can't test drive the game for a short period to determine if it hits that itch that attracted me in the first place. If I may offer a suggestion, if you are so inclined to not have a recurring 1 month subscription then perhaps consider offering a "once per account" 1 month trial subscription so people like myself can determine if the quarterly sub is worth it or not to us. I'm not asking for a freebie, merely suggesting a more enticing approach to bringing in more cautious consumers like myself. Until there is something like this or a solid monthly subscription I can't (currently) in good conscience buy into this service.