Bear with me, but after reading the posts here, I still do not understand. First time CBL purchaser, and as I attempted to purchase MacOS Pro version, the screen shows me the Pro product and the optional Annual Maintenance (AM). Auto-renews. Money is not the issue. I have looked on CBL site, and so far I cannot find anything much about 'Annual Maintenance', except two forum threads, and the reseller checkout cart option (which, as I recall, doesn't provide much or any detailed description).
(1) Should I / Must I purchase AM now, in order to get Support (I think?) ? OR
(2) Should I / Must I purchase AM 1 year after Pro purchase, in order to get Support (I think?) ? OR
(3) Something else due to my misunderstanding?