Perhaps business-hostile isn't the best phrase, but their terms let Gandi stick their nose in areas which normally would be civil matters between a domain holder and a third party. For example, Gandi reserves the right to terminate your domain without notice if a third party notifies Gandi that you are involved in:

  "any infringement of applicable law in any way (for example
   using an automated script)" [section 12.2.1]

How familiar are you with the laws of France, under which this agreement has jurisdiction? Is your business a search engine and you have automated scripts which crawl websites, collecting information? What if collecting, storing, or displaying that information violates a law in France? Are you running some kind of bitcoin-related service and is it compliant with money laws in France? What if you have a ride-sharing service? Are you sure you're not running afoul of taxi regulations? In any case, I hope you have a lawyer who speaks French:

  "Only the text of the French version of this Contract
   shall govern in the event of a dispute of interpretation
   of the present Contract."

Did someone file a copyright claim against content your users posted? Are you doing anything Gandi deems morally objectionable? Gandi could shut down your domain. More info: https://news.ycombinator.com/item?id=3405177