It does. The theory works. But the bigger question is also what is the quality of the exposure.

Now that the biz model of those services is becoming more known, specifically their earnings, it is obvious that we will see many more of them. Often also at a much lower rate. Within the shortest time all content in your feed will be only promoted (resteemed).

The floodgates will be totally open and while you may try to tailor your feed by following people who wrote about topics you love, the noise level of resteemed content (in many different languages too) will just result in not looking at your feed anymore.

The pros are merely short term. The better bots cost... big time. Promotion is expensive. But it's a solid biz model. And everybody feeds the machine. :)

Long term, if the platform ends up becoming overrun by paid services who take the largest chunk of curation, Steemit will end up a bubbleware platform dominated by few corporations. That doesn't sound like it will be good for our SBD.

It sounds like bubblepop.