I disagree. The company is mentioned multiple times, a conflict of interest is clearly visible. We also don't complain about Google et al publishing papers about some of their internal systems and why it helps, I hope?
They sometimes are.
If you have an issue with the methodology of paper then all well and good but "conflict of interest" is pretty weak.
Yes, Google and Microsoft et al regularly publish papers describing Sota performance they sometimes use internally and even sell. I didn't have to think much before wavenet came to mind.
Besides, the best performing models here are all Open AI.