Many startup applications utilise the word of mouth marketing tactics to spread organically the product and make revenue.

It would be useful as a danceLib user to share danceLib with a referral code. Potentially incentivise members to share with some money off the next subscription, or build points for a free t-shirt , stickers, or private class with a dancer.

I would love to share the application and gain some insights to the success of the members I share danceLib to, did they click and sign up, did they invest in the product?

Best of luck building this, or buying a referral product in the short term.