dude already have gold rank ...seems kinda useless to have coal or redstone ranks... We already have enough ranks, if you are suggesting we should go cheaper just buy the iron rank it isn't that much, but if youre suggesting we should but it up to like £200, that would be pointless since no one will buy it.
Coal rank is meant to be obtainable in game
and redstone is for mods, buidlers, devs
WowI'm sorry but I don't agree with this idea. With the coal rank being found inside the cubelet would be unfair to other players. (Assuming they rank perks like choosing maps and thing this that) In that case, more of the lower ranks would feel cheated (eg. Iron Rank, Lapiz Rank)
With the redstone perk, the color would have to drastically change. Cubecraft can't make there own custom colors without a texture pack for the colored names above tag. The administrators have a darker red color with the code of &4. The Youtubers have a color of &c and &f. That's all the color codes that make the shade of red. No other color. You can see the list of color codes here: http://wiki.ess3.net/mc/
Coal Rank: As this rank could only have a color change just like @PingEther04 Said its just for color, it doesn't have to have perks
Redstone Rank: wasn't aware of the texture color thing, i guess this could be ignored