Thnx for the answer and question xD

The Airdrop will be done on 12 december 2020 and xrp hodlers will be able to claim those Spark tokens until 6 months after given date.

The ratio will be 1:1

Info: Flare network website: https://flare.xyz/
Supported exchanges as of 2.9.2020 are:
- Bitrue: https://www.bitrue.com/
- AnchorU$D: https://www.anchorusd.com/