It's been a while since I've been on the staff of a supported fansite, but as far as I know, no relevant item has ever been removed from the prizes list.
However, until the summer update 2010 it was possible to obtain runes with x99 charges in contests. It is worth mentioning that in the past runes with more than 1 charge were rare. These runes were replaced by rune emblems.
Between 2009-2010, these were the items available on the list:
- 2x runes with each 99 charges (rune can be chosen by the winner) - Until the summer update 2010
- 10x bullseye potion
- 10x mastermind potion
- 1x tome (colour can be chosen)
- 1x jewel case (as a first prize)
- 1x yellow rose
- 1x wolf whistle
- 1x teddy bear
- 2-3x amulet or necklace (like elven amulet, protection amulet, silver amulet, stone skin amulet, dragon necklace)
- 1x special amulet (like terra amulet, glacier amulet, lightning pendant, magma amulet)
- 5 rings of choice (axe ring, club ring, sword ring, dwarven ring, energy ring, life ring, power ring, time ring, stealth ring, ring of healing)
- 100 infernal bolts - as a first prize up to 500
- 100 demonic essences – as a first prize up to 400
- 30 days premium time or 90 days premium time (depending on the event)
- cups of honour (bronze, silver, champion - for soccer events)
- warrior trophies (bronze, silver, golden)
- trophies of excellence (bronze, silver, golden)
- goblets (bronze, silver, golden)
- medal of honour
- rune emblemes
- frozen starlight
- stuffed dragon
- baby seal doll
- panda teddy
- teddy
- nightmare doll
- stuffed toad
- 1x addon item (Mandrake, Soul stone, Dragon Claw, Nose Ring)
- 3 bast skirts (as one prize)
- 4 pirate items (as one prize) (the Lethal Lissy's shirt, Ron the Ripper's sabre, Deadeye Devious' eye patch, Brutus Bloodbeard's hat)
- death ring
- demon trophy
- one of these trophies: Wolf, Orc, Behemoth, Deer, Cyclops, Dragon Lord, Lion, Minotaur, Marlin, Bonebeast, Disgusting, Souleater
Between 2011-2012 , the following items were added:
- gold ingots
- one of these taming items: hunting horn, tin key, leather whip, reins, carrot on a stick, giant shrimp, slug drug, fist on a stick, bag of apple slices
- vampire doll
- mini mummy
- hero's medal
- elven trophy
- badge of glory
- royal medal
- heavy medal
- snake god trophy
Other items were added in subsequent years, such as:
- copper prision key
- bronze prision key
- silver prision key
- golden prision key
- dream matter
- bamboo leaves
- decorative ribbon
- foxtail
- golden can of oil
- golden fir cone
- harness
- maxilla maximus
- sweet smelling bait
- blue sphere
I don't know what the current prizes list is like, but I usually follow the contests organized by fansites, and the prizes still seem to be the same, without any major changes.