1. Lists only features of their product.
2. Doesn't lists any features that their product doesn't support.
3. Aims mostly at shaping expectations so that one would find their product.
4. Uses the guest-blog trick to boost rating / cross-linking.
It's is all fine and dandy in the culture where somewhat things are newspeaked into hacking growth or whichever new euphemism is in vogue.
If they knew about some other feature search-boxes should have, but which their product doesn't, don't you think they'd add it to their offering? #1 and #2 being true is the equilibrium-state of building a product to address every problem you're currently aware of.
I really don't see the problem here.