Dofollow and nofollow don't matter as much as the did a few years ago. It will look like unnatural link building if 100% of your backlinks are dofollow. There'

Dofollow and nofollow don't matter as much as the did a few years ago. It will look like unnatural link building if 100% of your backlinks are dofollow. There's usually a intial period where sites with zillions of spammy backlinks will rank, then they will crash after a weeks /months and will probably never resurface again.