50 XP Levels in Lootbox - clarify this

I have no idea if anyone bought this/if it's being kept for next seasons lootbox, if not you may disregard this The amount of XP required to level up goes up per level. Does this give a fixed amount of XP (5345) enough to get you from 0-50, or does this give you 50 levels regardless of what your starting level is? It's also important to consider that you could potentially take advantage of this by using /trade