As stated, Bitcoin SV is a fork of Bitcoin Cash. In terms of ownership, this means that if you owned Bitcoin Cash at the time of Bitcoin SV hard fork which was in November 2018 (This event was essentially when Bitcoin SV split off from Bitcoin Cash), then you were deemed a 'holder' of Bitcoin SV. As a result, you were given Bitcoin SV to your wallet for holding Bitcoin Cash for free, since Bitcoin SV is a fork from Bitcoin Cash. The same exact thing happened when Bitcoin Cash forked from Bitcoin. Exchanges like Coinbase supported this transfer, and therefore, if you owned Bitcoin Cash on Coinbase at the time of the fork, you were able to withdraw the Bitcoin SV to your own BCHSV wallet and do with it as you want. Essentially, it was theoretically 'free money', however, not all forks end up as successful free money as BCHSV did.