I believe writing Malbolge programs became easier (in a very relative sense) once Lou Scheffer published his cryptanalysis (!) of the language (specifically, the instruction encryption scheme) in 2004. [1][2]
> The day that someone writes, in Malbolge, a program that simply copies its input to it's output, is the day my hair spontaneously turns green. It's the day that elephants are purple and camels fly, and a cow can fit through a needle's eye.
Otherwise I am inclined to believe that this must be the result of exploiting a loophole, perhaps the interpreter not implementing the malbolge specification or something.