this is a very good point as if I'm correct, you would receive 1 coin per play from promoting your music + potential onward plays if they visit your profile. If only a referral link is shared then the best is someone signs up and the funnel stops there.
I think the best is to share your music link where possible to get plays and discovery
just my thoughts
What I actually mean is the referral link under your profile that rewards you for the referral not for the play. This is a great way to encourage new people to join the platform and I think it should be rewarded if someone signs up from the embedded player.