I personally actually think that this very thread became a community on its own by now. We have our regular users, our well-known gifters that hype their games with teasers, our gif makers always being so creative, and so many regulars just bantering together in the face of GiftBot giving us joy or disappointment.
I would have agreed, and actually have agreed to the "no lurker" option not making any sense for giveaways happening in this thread 3 weeks ago when this was just starting. But now, I would argue that we have a community in this very thread, and that people wanting to create giveaways to reward people who actively participate in this thread, by making it lively, generous, fun and wholesome, have a right to create giveaways with restrictions that would help that happen.