Hi leyakoreya
I'm sorry but I don't know why they are greyed out. It's the first time I see something like that...
Are you sure this issue is related to ATUM? If you disable ATUM, can these products be added to the cart?
As far as I know, we don't display any product titles in gray, ever. So, perhaps is some kind of CSS being added by a 3rd party plugin or something like that, I'm not sure.
Best Regards,
Salva.