A while ago CCP Diagoras posted some statistics on Twitter for the percentage of items that come from Invention vs Tech 2 BPOs to help quell the tinfoil hat theories that Tech 2 BPOs control the entire market. I recorded and sorted the tweets, but never released them.
What does this mean for you as an inventor looking at the market? Well, you will most likely want to stay away from the red items as the Tech 2 BPO owners have a stronger control on the price and can undercut you below your profitability threshold.
If you are interested in further Tech 2 BPO research that I have conducted, take a look at the T2 BPO Returns post.