That one is probably going to be more resonant for individual players. The violence is kind of de rigueur at this point.
Players will earn a Merit Plate just for signing up to take part, and winning matches in the colosseum will bring you closer to rewards for being the best of the best. If you’re not the best, though… well, you’ll still get plenty out of it, as just participating earns points which go toward PvP ranks and associated rewards. So it’s worth it to strive, even if you aren’t very good at first.
Source: Official Site