Yes, there is still availability in both Y & J on revenue tickets, however Y has only a few seats left (according to her, I haven't looked) and J is pretty open. All normal upgrades are gone.

Therefore the perfect storm of Y being oversold with space in J looks like happening, so why not release a couple of extra seats and be 'paid' 30,000 miles instead of nowt?

This is all just a thought, I could be miles wide of the mark!