@im_network I've been in the same situation as
@dreadpixel in trying to help people monetize such lists consisting of random people where the list-owner doesn't want to reveal how the list was acquired - it becomes very frustrating trying to help such people, so I'm with
@dreadpixel on that.
To any seasoned marketer with experience and to any data source worth their salt, HOW the list was acquired is often just as important as WHERE the data came from, WHEN it was acquired/aggregated, WHO the users are (demographic/psychographic characteristics and/or behavioral traits) WHAT you are promoting to them, and WHY you have chosen to market to that specific list (In no particular order, in this example).
You might be overvaluing your list in thinking that you can easily make quick, instant money from a random list like that. Your list is what we call a "cold" list, meaning the leads are from no specific niche and you have no direct relationship with those accounts. If you have patience and are truly dedicated to making that list *possibly work for you (no guarantees with a list like that, and even then it could still take awhile to get anything out of it), then I would start by researching terms like "cold email", "cold emailing techniques", "cold email marketing", and "cold email list segmentation" for starters.
I would also use an email list validation and email hygiene service to clean that list prior to starting any email marketing campaigns in order to avoid spam traps, hard bounces, and any other issues which could damage your campaign's overall effectiveness. I won't get into the reasons why such a service is important in this post. You can search this forum for such service providers. Reading through their marketplace threads might give you more insight into this issue.
However, take note: cold emailing may be illegal in certain countries so do your research prior to starting any cold emailing campaigns.
As far as WHAT to sell to them, one possibility is more likes and followers to their user accounts. I've heard that (some) kids these days are obsessed with online popularity, so perhaps trying to sell them on such a service might work for you. Also, selling courses on how to become "Insta-famous" or a social media celebrity might be another possibility. If you have a good tracking in system in place, even if you get no sales you might still gain some value from the list by seeing what those emails as least clicked on as a starting point for "email list segmentation" and "email list nurturing" (look those up those last two concepts as well).