Adobe Firefly commercial use

It saying that you can use adobe firefly 1 model for commercial use, not 2nd model. Right now 2nd model is beta version. When you  generate something with firefly 1 model, you can use it commercially, but if you generated image using firefly 2 model then you can use it only for personal only.
In both of them adobe will add information what model is used for generation of that image, so it will be easy to understand it was used with first model or second.

Hope this helps.

And please 

Do not use Adobe’s generative AI features to attempt to create, upload, or share abusive, or illegal, or confidential content, or content that violates the rights of others. This includes, but is not limited to, the following:

• Pornographic material or explicit nudity
• Hateful or highly offensive content that attacks or dehumanizes a group based on race, ethnicity, national origin, religion, serious disease or disability, gender, age, or sexual orientation
• Graphic violence or gore
• The promotion, glorification, or threats of violence
• Illegal activities or goods
• Self-harm or the promotion of self-harm
• Depictions of nude minors or minors in a sexual manner
• Promotion of terrorism or violent extremism
• Dissemination of misleading, fraudulent, or deceptive content that could lead to real-world harm
• Personal or private information of others in violation of their privacy or data protection rights