I don't know if anyone has mentioned here yet, but "sub for sub" might not work as it is on here than on Wattpad.
Here, dead subscribers (the one who do not comment, like, or share) will drag down your series by algorithm so they are less likely on Trending or Popular (a.k.a the sweet spot if you want your novel to be seen). They are more determined by "likes," rather than views and subs.
Another note is as the tagging and search system here is not as good as Wattpad, you need to compete more to rank on trending and popular by genres as there is no rank for certain tags. The genre selections are also more limited.