In Classic Grief (aka 2020 style)

• Eat with command /feed (once per 5 min)
• Heal (outside of PVP) /heal (once per 5 min)
• Ignore players /ignore
• Sell more items in /market - 10
• More /sethome points - 6
• More /region claims - 4

In Modern Grief (aka Cetrine)

• Nice bright red prefix in playerlist and chat
• 
Hide specific players from your chat
• 
Wear any block as a hat

• Open crafting table with a command
• 
Open enderchest with command (outside of pvp)

• Set your afk status

• You can heal yourself (outside of pvp, with a cooldown)
• 
You can feed yourself (with a cooldown)

• Set 5 home points and claim 4 regions

• Sell up to 10 items on auction
  
  Rank will last 30 days from time of purchase