imagine those who have little SP, they would vote each comment at 100% and still it would be dust

Exactly my point; Sleepers will wake up for a week or so, but after finding out that for them it has even become more difficult, they are gone just as fast as they came.
And discouraged by lack of engagement, upvotes, being ignored and or neglected, most newbies will become Sleepers in no time as wel.