This entire thread can be summed up as follows:
"It would be nice if there were other subscriptions options in addition to 1 month or 1 year. Not making other options available is regrettable, but ultimately the decision of the site owners."
The one year option is the same as what video rental stores used to charge as a late fee. The entire business model is predicated on you not returning videos on time and in Chess.com's case, not using the entire year. In other words, they're counting on it.
Is that unethical? No. They promise a service and they provide it.

it is good walue for the many..
In that drop down list choose "custom" here on chess.com and you can pick any time control.