Has anyone else seen a big gap between SubmitHub smart link conversions and actual Spotify streams?

I’m running Meta conversion ads optimized for ViewContent to a SubmitHub smart link.

Campaign so far:
- CA$150 spent
- 202 SubmitHub conversions
- 105 Spotify streams after several days
- Strong Instagram engagement (hundreds of likes and a noticeable increase in followers)
- Good Spotify save and playlist-add rates

The part I can’t reconcile is the funnel. If 202 people clicked through the smart link, I would’ve expected more than ~105 streams. It seems unlikely that half the people who reached Spotify either never hit play or stopped before 30 seconds.

Has anyone else experienced something similar? Is this normal with SubmitHub/ Featuredotfm /etc., or am I misunderstanding what “conversion” represents?