I don't want this come across the wrong way, but have you tried talking to them about scams, or what they see in the banner ads? It might give you an idea of ho

I don't want this come across the wrong way, but have you tried talking to them about scams, or what they see in the banner ads? It might give you an idea of how credulous they are. My parents are in a similar age group, and I frequently share information about scams with them. I don't expect all the information to stick, but it just keeps re-enforcing the ideas of 'no free lunches', 'too good to be true', 'pressured to act quickly' etc.