A guaranteed 50 tons of Diso Ma Corn from one stop is a pretty good reward.
I don't know where you're buying the corn, but it wasn't 50 stock when I checked after the CG ended.
The absolute number of participants is irrelevant. "Enough" is the self evident answer to how many participated on a CG that completed all tiers.
You still don't get it. I've said this many times: you cannot say the participation is "enough" if you A) don't know what kind of participation Frontier wants and B) how many people actually participated. It does not follow that you can determine participation was "enough" from the mere fact that a CG completed, or because it did so faster than usual. The craziest thing about our little back and forth argument on this is that it was never a claim of mine that CG participation is not enough. I actually agree with you -- I think CG participation is probably fine (but I admit I can't know absolutely for the same reasons I'm telling you). My post is about CG profits vs. regular trading; I only had that section on participation before to highlight the fact that participation rates will tend to drop when people realize more and more that it's not beneficial to them to stick around grinding to the top tiers.
People being indifferent to the sociopolitical or historical aspects of the CGs is, in my opinion, not any excuse what so ever to make the CG's worth while from a pure credit standpoint. Of course, in game, the factions behind these CG's should be offering incentives in accordance with their needs and abilities, which may need to take the public appeal, or lack thereof, of these aspects into account.
To be clear, I never said CG's should be worthwhile from a profit standpoint because people may be ignorant to the underlying backstory. The only point I've been trying to get across in my post is simply that from a profit standpoint there is no reason to spend much effort to get beyond Tier C while the payout goals remain the same and you already have a decent trading route.