The company has drivers and a shop which will do all online orders via them. They will also be featured in magazines promoting their business.

They have no investment because they want to increase value by doing first and then scale up via investment. Is this called bootstrapping?

I'm not sure if I want to be a co-founder with an equal share since that would force me to go all in on the business idea.

I am interested in the idea of working close to self-employed and create new services which can grow. It's just the "no-salary until date X" deal I'm unsure about. I'm thinking about suggesting some alternative contract offer.