I don't understand what the implication is here. This is just a list of 3 completely obvious spaces with a competitor from each firm. Um... yeah? So the fuck what? Total linkbait.
The explanation for this is pretty simple: the groups we like, we fund.
In this case, what incentive do you have to keep the idea to yourself, and not tell/hint at it to a funded startup?
That we promised to. And in actual fact it is very rare to hear a good idea from a group we don't want to fund. I can only remember being constrained by our policy once, when a group we interviewed had an idea I thought would be useful to Bountii (I think it was).