Every few months the needle keeps skipping backwards on this record player.
It's very simple... if you don't want to renew, don't... The rest of us don't necessarily share your "obvious" observations. For some of us, there is value. The continual whining from people about the extra $15 and starting new threads like this every few months really doesn't change anything.
Other organizations do the same thing with membership dues when it's just over the deadline. Dues were in December for a certain professional organization I'm a member of, but they send me a reminder and indicate I can remain current if I pay by the end of the month(January). Nothing unique to TCA for that part.