![witness_thumbnail_update.png](https://steemitimages.com/DQmR2KDhUw4rijkQR1ENhS5u3WHTgZp1UcHH45a8sL2y9P9/witness_thumbnail_1000.png) *** # Hardfork 21 *** As of last Thursday, our witness has been running HF 21 Stable and Sound, after running it on the backup server for a couple of days. Fun fact: We are using MIRA to test it and without too much effort yet it's running at 25gb ram. Replay was about 16 hours. ## Convergent Linear Reward Curve + 50/50 *** The reward curve has been changed to convergent linear (n^2/(n+1)). Meaning it starts out superlinear but it will bend down towards linear the more stake is concentrated on the content. This means a post needs to get a certain amount of votes before the curve become linear. According to the latest interview with @vanderberg, that's around the $6-$7 dollar mark *(Maybe a little lower now with STEEM price coming down a bit)*. The idea is to further increase the voting on quality content. A separate downvote pool is introduced to increase the number of curation options users will have to reach this goal. Another tool introduced is the introduction of a 50% curation reward from 25% further incentivizing better curation by stakeholders. While we don’t exactly agree with the change in the reward curve (we prefer linear) we do like the 50/50 and downvote pool for more curation options and to combat abuse). # SPS - Steem Proposal System *** Hardfork 21 also introduces the Steem Proposal System. It will allow for people to submit proposals for funding which will be funded by donations and inflation (10% from the current reward pool). ## Other changes *** * Curation window further reduced from 15min to 5min * various fixes and updates [Read Here](https://github.com/steemit/steem/releases/tag/v0.21.0) for further details on all specifics related to this HF. ***

--- ^{If you support us please vote [here](https://steemit.com/~witnesses) for @blockbrothers or set us as proxy
or use these SteemConnect links} [

](https://v2.steemconnect.com/sign/account-witness-vote?witness=blockbrothers&approve=1)[

](https://v2.steemconnect.com/sign/account-witness-proxy?proxy=blockbrothers&approve=1) --- _{Makers of Steemify. The dedicated notification app for anything happening on the Steem blockchain.}

Get our tools: [![Icon_steemify.png](https://steemitimages.com/DQmaTi3zzqtBVCJqwfjhgQBBKKtHyNmw8SQu32FXVGM5aBK/Icon_steemify.png) Steemify](https://itunes.apple.com/app/steemify/id1290154477) [![Icon_nozzle.png](https://steemitimages.com/DQmaRv4NaHZ29jKazkPwoZoB5eNDrPYFbW88yM5CURHSVC5/Icon_nozzle.png) Nozzle](https://github.com/blockbrothers/nozzle) [![Icon_votebot.png](https://steemitimages.com/DQmVjxNT3Jqmsh3NXDJAoJDWvVP3t8Bonz8jiKJZGKj52wb/Icon_votebot.png) Votebot](https://github.com/blockbrothers/votebot) --- Get in touch: ^{[https://blockbrothers.io](https://blockbrothers.io)
steemify@blockbrothers.io | witness@blockbrothers.io
Telegram: https://t.me/blockbrothers}