So if I build something on top of this that actually turns out to be popular and turns a good profit, what is to protect me from Slack then building it in the c

So if I build something on top of this that actually turns out to be popular and turns a good profit, what is to protect me from Slack then building it in the core product that cutting me out or shutting me down? Not much I guess. Twitpic anyone? [1]. 1. https://blog.twitpic.com/2014/09/twitpic-is-shutting-down/ https://blog.twitpic.com/2014/09/twitpic-is-shutting-down/