Geos/StoneSmoochers ADRENALIN: Exploration Targets, historic Resources, Prospective Resources, Strike Lenghts, page-614

Yes, otherwise no Access.
It's "just" registering,
if you have no Problem leaving your Datas there, it's All fine, totally easy.
No further Obligations, as I know.
You ('d) also get a, daily, Letter, which I quite like.

So,if it doesn't disturb you with leaving your Data, your Privacy, I'd suggest: just subscribe.
Otherwise, no Idea, it just wont work.

Good Luck