200 posts a day is not humanly possible but anyone can post more than 4 a day. It doesn't actually matter how long or how short the posts or how many posts a day. What matters is growing the reward pool and increasing the size of the user base.
See my ideas for referral marketing programs for SMTs, and also like with anything people who have more time than money can post more than people who have more money than time. Increase the wealth of the network with SMTs to avoid the scarcity mind set.
200 posts a day 'is' (collectively) humanly possible... with a sufficiently big team of content creators or shadow-writers (discounting plagiarism). Just saying. :c)