I actually found some comfort in reading the condolence messages left for my dad - people who hadn't met him in years or who had worked with him decades ago left lovely messages and memories of him. I printed these out and still have them.
It's not all about 'snooping'.
Shame about the charge, it does smack of greed however it will just become part of the funeral director's charge so many people won't even particularly notice (yes, of course, many will also struggle with the already large expense of the funeral).