I think they are naturally bionic...
I think it might be a result of the Horde's Techno Virus. The techno virus seems to have been a devastating thing for Eternia... it may have affected evolution. We know that the Arachnids and the Andreenids are related... the techno virus may have helped and encouraged the Andreenid mutated genes.
It's just a fun way to work with what Mattel is using in the bios
So, I think in this case, the cyber-netic aspect is bio-cyber-netic... after all, human hearts run on electricity... we're machines in a way.