Evil tree reward percentage is based on personal contribution, not what other people are doing so I don't really understand why we're locked out of rewards when someone else tags it.
And if it's because someone can help you chop the kindling to get to the main tree then arguably the xp from chopping the main tree and burning the kindling is the benefit you're getting from other people, but that's not locked out? It's a bit odd.
Not to mention people will come and tag the tree and leave just so I can't get rewards.
Editing to add after reading some of the discussions on reddit: I'm talking about the original Evil Tree D&D, not wildy flash events.