It's definitely a good investment, the recipes and brewlogs are worth the 25 bucks many times over. I keep meaning to upgrade to premium patron again, but keep forgetting... (it downgraded me from premium when it renewed after the first year).
I like to push the patron fee on people pretty hard, for a lot of reasons. One, I really do believe that getting mead making info from pretty much anywhere other than this site is going to result in far less quality of the advice a person receives (exception going to K.Schramm's book, but hey, he's a member here too and can give you advice himself!). I guess there's an exception if you llive somewhere like eastern Europe where meadmaking is still done commonly. Here in North America though I've yet to find a resource that comes even close to the knowledge here! So that said, keeping this site operational is pretty important for the future of mead making in my humble opinion.
Also, the proceeds go to support the Mazer Cup competition, which is a pretty amazing competition.
Anyways, that's my rant for now, I'm sure I'll repeat it soon!
EDIT: I only ever stumbled upon this website by accident too. I was searching for meadmaking resources online and had found probably 20 or 30 sites with the same old outdated boiled recipes with acid blend added and irish moss, etc, no aeration, months to ferment... terrible!