Here’s my take on this.
I can see both sides of the argument when interpreting a Snap score. A rapidly increasing score usually points to a high volume of Snaps being sent and opened, rather than just text-based chats.
The key distinction is how the Snaps are sent. Sending a single Snap to ten individual friends will grant you a point for each person, making it a very effective way to boost the score. Conversely, sending that same Snap to a group chat only counts as a single point.
So, high activity could mean someone is meticulously maintaining many Snapstreaks with different people, or it could simply mean they are sending mass snaps to their contacts list. The score reflects the quantity of interactions, but not necessarily the depth or context behind them.