Link building for several projects at once usually lives in spreadsheets: one tab of anchors, another of donor sites, a third of links already placed. Each new placement means cross-checking all three by hand.
The mistakes add up. One page gets the same anchor again and again, its anchor profile turns lopsided, or the same site links to it over and over while other sites in the network stay unused. With dozens of URLs and donor sites, nobody remembers what went where.
Promotion ran through my own network of sites, so every link also had to be published by hand on the right site. I needed a workspace where every promoted URL has its own anchor list, donor sites are shared across projects, repeats are visible before they happen, and a placed link reaches the site without manual work.