phone numbers aside while this is more in the past/pre smartphone era i'd think more serious ppl would just go in person
heard of caloriemate before never tried it but idk if it's a 'good gift' or something cheap compared to other chocolates
i wouldn't say 'doing research' means you have no pride lol, it's not as if they're trying to find personal weaknesses
that said other than an official agent i wonder how many ppl would believe it or so