>>10441770a contract is just a legal binding document that can be done between individuals. in this case Gyari made a contract with a person giving her rights to use his character design and affiliate herself with his circle. When that person violated a clause written in the document he had right to revoke the contract preventing her from any further use of the character.
Also for something to be call corporation or company it has to be legally registered as such and for someone to work for a company implies a contract is made with some monetary compensation in exchange for works is written which VOMS has obviously stated many times that they have no such thing. VOMS members get 100% pays from youtube monetization while Gyari keeps all profits from merchandise he made.
hope this clears things out a bit for you