I have been a member for YEARS and seen them all. There is nothing hardcore. For individual models, you will see some spread shots and cheeks spread from behind. No toys, no fingering-- nothing like that.
For the g/g sets, same deal-- implied kissing, but no fingering or licking, as far as I have found.
NOW.... most models have their own OF, Pornhub, cam, other appearances besides SG and there is a wide range.
If anyone else is a member, it would be great to continue the thread and post our faves from the actual SG site. There are plenty of threads for individual models here.
Here are samples of sets that I happen to have saved that are the most explicit you'll find to my knowledge. I'll provide the girl's name
Elease
Erisverba
Mhere