I tend to agree NI, as we don't want to encourage bubbles.
There's no need to cross promote cobalt stocks on the stock threads when you have a 'commodities' forum, but it would be easy to post on ASX General with 'cobalt stocks' as the subject and start a discussion on what's available at the moment.
I've asked the techs to add the topic, but if it isn't well used, we may need to remove it again.