Can confirm that you can actually reach developers at Apple by contacting DTS (developer technical support). However, in my experience, the answer was either "sorry that's out of scope" or "can you please report this as a bug" or "this feature intentionally doesn't do what you want.

I once found a bug in Safari that affected reading LibreOffice's OpenGrok instance on iPads. I reported it to Apple, but eventually I managed to find the radar incident, then I was able to find the WebKit Safari commit where an Apple person fixed it.

I emailed him directly and he very nicely replied, though there wasn't anything he could do.

This all worked outside the Apple support system. Ironically, Apple probably have the best consumer support system out of anyone, and they are still not brilliant.

Do you know if they allow companies to purchase more than two?

Yes you can. "Additional TSIs are available for purchase in either a 2-pack for $99 USD or 5-Pack for $249 USD in the Code-level Support section in your account."

Thanks! Noted for later, I might need it.

"I'll take 5 2-packs please."

"Sure, we can just do two 5-packs."

"No, I'm trying to save three bucks here."