ahofer,
From what I understand, anything that looks like a "bet" is frowned upon here. Period. This is a commercial site. I can see why they avoid any potential to appear to be facilitating something like that. They don't have Facebook's lawyers. It is easier and safer just to discourage it. Whether what you suggested was good, valid or otherwise is not the point. Best to just let this one go.
From what I understand, anything that looks like a "bet" is frowned upon here. Period. This is a commercial site. I can see why they avoid any potential to appear to be facilitating something like that. They don't have Facebook's lawyers. It is easier and safer just to discourage it. Whether what you suggested was good, valid or otherwise is not the point. Best to just let this one go.