As representatives of Adobe my colleagues and I cannot comment on licensing. There are links provided on this forum for licensing terms if you cannot find what you need you may need to consult an attorney.
Free assets can also be used commercialy given you respect the licensing terms. There is no difference in licensing terms between a free or a paid asset.
Look here for more information on licensing: https://community.adobe.com/t5/stock/links-for-licensing-terms/td-p/11366788 (Disclaimer: As always with licensing, this is my interpretation of the rules. I think they are correct and advice is based on reading and interpreting the licence terms and on fair use for both the buyer and the artist/stock company, but I cannot rule out that my interpretation is wrong. I'm not an Adobe employee).
ABAMBO | Hard- and Software Engineer | Photographer