I am in progressive era and I have had 2 & 5 goods but no 10's. As far as I know the goods change with the sort of incident you get. Common 2 goods, uncommon 5 goods and rare 10 goods.
Hmmmm ... I'm not seeing that at all on 'live'. Maybe things are different on the live server than here? Maybe ...
On live in HMA, where I've been tracking it since they came out with it originally, I have gotten nothing but 5's. I would think that after 6 weeks or more I surely would have gotten some 2's and 10's if they were using a 'common, uncommon, rare" scenario. They say they ARE (?) using that scenario (supposedly) for the
incidents themselves but have not stated the same for 'rewards/goods/age' (not that I've ever read).
Here, in Beta, I have gotten 2's only BA. And 2's, a couple of 5's and a 10 in IA, but I don't see them linked to any specific "rare" set of 'incidents'yet. Goods show up everywhere here and in 'live'. But that would support your theory. So you are probably right ... here in Beta.
Between 'live' and 'beta' I guess I've probably been comparing apples and oranges.