What does it mean if a guy follows a girl’s spam account on Instagram?

so this guy recently started a new internship and he went out to a gathering with the other interns at the end of the week. and then he follows 2 girls and 1 of them has another spam (i assume) account with less than 10 followers/following and he ends up being another one of the followers/following.
not looking for hate here/'just ask him'. what are the possibilities cause i know girls don't let just anyone follow their spam account? (i do think she followed him first which is what led to him following back)
but does this mean the girl could be interested in him and he's also interested?

What does it mean if a guy follows a girl’s spam account on Instagram?
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