> how big is the risk of them calling it quits
In our specific case, the business is setup such that it is self-sustaining. There's no free plan, so for as long as you are paying for your storage, we'll be profitable.
Outside that, I would say trust snowballs in the long run.
Also, I don't know if size of a company is a metric that should warrant additional trust. The mission could be diluted in a larger organization, and hard-pivots could hurt them lesser.