You could probably crank it up to 80-100 posts per hour if you started jumping into megathreads and going really generic. That's $30/h for essentially non-stop work. It's equivalent to about a 5.5 hour (per day) work week.
Make a script to generate generic remarks about "the bitcoin" and you'll find your margins increasing more.
Would you actually be able to do it full time? Sounds like an easy way to burnout after several days at most, and it would only be a matter of time before you would get banned. Your posts in that experiment aren't that bad actually (compared to an average stake.com/yobit sig-spam shitposter), but I bet your post quality would start suffering soon, to the point of getting eventually banned.