I think they didn't report how much people can make because it's not really related.
wealth is relative. If you lose $500,000 on a wager with a $40,000 annual salary and not a lot of assets, you're screwed. If you lose $500,000 on a wager and you have a multi-billion-dollar fortune, it's a drop in (from?) the bucket and, while annoying, won't be all that
So yeah, just throwing out the USD-equivalent in PLEX of the ships destroyed in a given EvE engagement is
useless, partially because PLEX and USD don't convert to each other that
easily (and isk is involved anyway) and partially because big corps can absorb a loss of assets on the scales being reported reasonably easily.