Back in 2019, I needed to book a hotel. I signed up to Travala which not only had a good price for the hotel I was after but offered $40 worth of AVA on signup. At the time, I thought nothing of it as I have random credit in Booking.com, Expedia etc and figured I'd use it next time I needed to book a hotel.
Today, the OzBargain referral system notified me of my referral link expiring and logged in to find the $40 of AVA is now worth $1000! At the time it was worth $.15/AVA and now it's at $3.59/AVA. Seems you can transfer it out to wherever (Coinspot, Binance etc.) but those who signed up check your accounts. Almost as good as the $5 of Bitcoin in 2015 now worth ~$1400.
I guess the lesson is to sign up for everything.