I suggested these a while ago but I though I might as well re suggest them :P
1. Double Cubelets - for a day or two after reaching the vote goal cubelets collected are doubled.
2. Xp Multiplier - multiplies the xp you get for a couple days after the goal is reached.
3. Special Events - possibly make some special extreme versions of games that are only available for a day upon voting rewards being released. This could be like versions of the game that simply has a ton of players in them or even return of games like Ender for a short time (though other games would probably be preffered.)
4.Going off of special events you could also simply do developer Q&A livestreams or a "come play with all the staff /owners" day :p not really a great idea but its there now have the cube community livestreams
5. Allow all cosmetics for all players for a day after goal is reached.
6. Rank Giveaway - After a goal is reached give out a rank to a random player either via twitter or another in game method.
7. Everything Unlocked for a day - simply put after a goal is reached every player has access to every kit/ability/tower for a day
That's all I can think of for now if you have any ideas/thoughts/opinions leave then below :D
Edit: you could also have multiple voting goals which do a different one of these each time probably ending with a special event after an insane amount of votes
1. Double Cubelets - for a day or two after reaching the vote goal cubelets collected are doubled.
2. Xp Multiplier - multiplies the xp you get for a couple days after the goal is reached.
3. Special Events - possibly make some special extreme versions of games that are only available for a day upon voting rewards being released. This could be like versions of the game that simply has a ton of players in them or even return of games like Ender for a short time (though other games would probably be preffered.)
4.
5. Allow all cosmetics for all players for a day after goal is reached.
6. Rank Giveaway - After a goal is reached give out a rank to a random player either via twitter or another in game method.
7. Everything Unlocked for a day - simply put after a goal is reached every player has access to every kit/ability/tower for a day
That's all I can think of for now if you have any ideas/thoughts/opinions leave then below :D
Edit: you could also have multiple voting goals which do a different one of these each time probably ending with a special event after an insane amount of votes