Protection methods used by products are listed right on the product page so shoppers can make the decision for themselves. It's no secret.
True but many DRM schemes such as TAGES has variations. Some TAGES protected games add activations after X days, some don't. Some allow infinite activations some don't. I've touched on this before.. but simply putting the name of the DRM scheme really doesn't inform consumers of the exact terms of the DRM, especially when DRM systems have major variations. Maybe XIII has infinite activations... or maybe you get 3 activations every 30 days.. Oor maybe its jsut 3 activations then your game is uselss.. Telling us its TAGES doesn't tell us which one of these apply.(although to many of us just being TAGES is enough for us not to touch it 
)
If DRM systems were standardized it would be fine.. but DRM companies like to give publishers Options to the level of protection.. as such any well known DRM is likely to have numerous variations. Some which may be acceptable to people in certain forms and not in other forms. Not everyone shys away from a particular DRM simply because of its possible implementation.(like me)
(on a side note.. i find it amazing that GOG could get it DRM Free and ubisoft insisted on TAGES for the impulse version)
