Peut-on acheter un vector pour l'utiliser comme logo?

Hire a graphic designer to create a custom logo for you.

Logos are unique and specific to your business brand's identity, not shared by millions of other Stock customers. 

You will never see another business using the same images as Coke, FIFA or Peugeot on their branding.  It's that way for a reason.

License Comparison:

https://stock.adobe.com/license-terms

From Adobe;

You can't use Adobe Stock images as part of a logo, trademark, or company identity. Typically, individuals and businesses using logos with graphic elements own the copyrights to those graphics. The Stock license grants you the right to use images under certain conditions, but it doesn't transfer copyright. Stock’s contributing artists retain all copyrights to their images.

Assets that do not have a vector notation such as AI/EPS format cannot be purchased as vector data.