You can already send "draft" or how I call it "preview" messages to Slackbot or to yourself. I am not sure why would anyone pay for a Slack integration when Slack already provides such feature for free.
I don't know how to feel with this. According to this calculator I [1] get exactly half of the salary of a developer with zero experience and zero skills, and I have working for an American company for a considerable amount of time. At first I thought my salary was based on the country where I live, but now I am not so sure about it. Saying that I am being under-paid with these numbers is actually a joke, under paid to me is getting $2-3k less than the average, but these numbers tell me that I get 50% less than a kid with absolutely zero experience.
[1] South American software engineer, with +6 years experience, and ~3 in skills.
I spent more than twenty minutes last night trying to create this throwaway account in order to publish an anonymous "Ask HN" using the TorBrowser, I even tried to "Download Audio" alternative and was completely sure that the numbers were correct but again the captcha reappeared as if the previous answer was invalid. I decided to allow JavaScript globally just in case without much luck. After some time I started to think that I was really a robot so I decided to create the account using my normal browser, very frustrating.