Powered up recently. The pool is quite stable at above >300k SP.

To tackle the demotivation right now: We can't see the 200h in development and 200h in marketing. The last post from shadowbot is from the first January regarding new year. I don't know where those 200h in marketing are, but it is not @shadowbot posting. And this main account should post the important stuff.

Some suggestions:

Take a look at @steembasicincome.
They are posting daily/regularly. Interviews with members, contest (held by other people, where votes are going and so on.
Use those 200h in development and post over @shadowbot what’s going on. What was the latest feature that was implemented? What is the next thing coming? Keep it small, describe it precise. Not a “There is something coming”. For instance, @steembasicincome informed us about the automation feature way back, with a detailed post about the planning.

Another idea would be to show how rewarding one shadow rank is. How much someone is getting back from the pool. Because basically the whole pool is generating a basic income for everyone in the pool.

To tackle the other big part: Incentives. With SBI you can only gain a unit if you sponsor someone else. This gives us the possibility to pull more and more people into the program, thus spreading the word.
But please no referral program. There is no extra money magically generated with someone joining the pool. The amount of rshares generated by the pool is limited and we can only distribute that. So make it fair for everybody. Someone joining with a big amount of SP should at least receive the amount of rshares back he is giving out on votes. Even with shadow rank 1.