Maybe because of this?
Bitcoin
Past limit: median time of last 11 blocks
Future limit: +2 hours
Granularity: 1 second Expected block time: 10 minutes
Blackcoin (New rules)
Past limit: time of last block
Future limit: +15 seconds
Granularity: 16 seconds Expected block time: 64 seconds
Granted, this is from old document and I could find no concrete news of their segwit activation, but this type of performance (whether or not this is true data, well, I`m not an expert and have not tested this myself) brings certain amount of confidence with investors. That could be one of the reasons why someone would use this particular coin.
Source:
https://bravenewcoin.com/assets/Whitepapers/blackcoin-pos-protocol-v2-whitepaper.pdf
RE: Missed out the train on BLK and XRP? Want to know what could be next? Read on.