This is a self explanatory situation. Like all things in ro, a GM event should be a competition. It should serve as an activity, not a binding agreement to receive something, for nothing. I understand the GMs want the best environment, but as we've witnessed today, there are people who are just in it for the prize, while offering the bare minimum.
This has to change, or it will only get worse. Competition breeds a healthy participation value, and most importantly, respect for the fellow players, and the GMs hosting it. if you create an entitlement group, they will only complain and ruin what you are working so hard for to achieve.
Thank you for reading, and please consider offering tiers of rewards based on performance.