Here's the most important part IMO:

He admits that — in general — when AMD pays publishers to bundle their games with a new graphics card, AMD does expect them to prioritize AMD features in return. “Money absolutely exchanges hands,” he says. “When we do bundles, we ask them: ‘Are you willing to prioritize FSR?’”

But Azor says that — in general — it’s a request rather than a demand. “If they ask us for DLSS support, we always tell them yes.”

SO developers aren't forced contractually to exclude DLSS, but outside the contract language, they are pressured to ignore it in favor of FSR. That explains why these deals tend to result in DLSS being left out, and also why there are some exceptions (e.g. Sony games--I imagine Sony knows what features it wants its PC releases to have and has decided to push back on DLSS inclusion). I think AMD is being honest this time, and I'm surprised it admitted publicly that it's doing this. Hopefully the word about this will get out and more developers will insist on including DLSS.