Bonjoro uses a system called Full Contact https://www.fullcontact.com/what-we-do/profile-enrichment/) to try to give you more information on your signups / customers from their email address's, such as that contacts full name and possibly their profile image.
This information is provided so that where names etc are missing from an email ([email protected] or emails such as Gmail / hotmail) - you can hopefully still personalize your message to that person.
Thats said, the system is not 100% - sometimes for various reasons it can pull a wrong image for a profile - potentially someone else of the same name, or an image associated with that domain. However, not to worry - this data is only visible to you, the person recording the Bonjoro, and does not affect your customers at all.
Our hope is that the good far outweighs the bad, but nothing is perfect:)