Why is it impossible?
I think it is more possible when a manga is published in a magazine with those.
I mean if I'd buy the Shounen Jump just for One Piece I at least whould read new manga to look if they are good or not.
If this is a good manga they will get attracted by the fans of the big long-running series.
But maybe it is just the way I would do. ^^
You shouldn't forget that people don't necessarily have the time nor the envy to read a lot of series. 3 or 4 mangas per week might be enough so they probably won't look too much at the new series.
Anyway, I was especially speaking in term of ranking. Long-running series are here for years and have huge number of fan that would vote for them no matter the quality of the previous chapter. After only eight chapters, Ougomaki couldn't really hope more than this ranking.