The 2 cheaper options with a Navigraph sub are:
-
Buy a one-month sub, update your FMS data and cancel the sub.
You will have more recent AIRAC data than the free option (2203), but it will be ‘stuck’ at the month you had the active sub until you make a new purchase. -
Purchase an annual FMS data-only sub (approximately €36 at last year’s price).
This latter option can be found in the ‘Your Account’ section of the Navigraph site and only when your current sub is cancelled/expired.
https://forum.navigraph.com/t/navdata-only-subscription/9714/2
Ultimately, I do agree with the OP that the over reliance on one third party provider is not healthy.