RE: My Grandfather created a steemit account
Actual curation % seems to be a bit lower, in this post explaining why
it seems that steemdb shows 14.9% as the average curation cut, so 85.1% goes to the authors on average.
Anyone curious about the high SBD prices should check out https://upbit.com/exchange?code=CRIX.UPBIT.KRW-SBD you can use chrome to translate it into English, they listed SBD/steem on November 21st and volume for SBD is very high compared to the market cap.
What you said about the 50/50 split pay option is true, as long as SBD is this high then everyone should be only using that as their payout option, and using the 100% SBD option on steem-related media sites that give that option.
https://steemit.com/steemit/@calamus056/curation-rewards-explained-in-great-detail
Is for anyone who wants to know more about curation itself.