In general, the economics of debris removal are also really unclear, because the actual risk of collisions is still pretty slim and the potential legal risk of touching another nation's spacecraft are high. Many objects are also too small to be tracked. The community is largely shifting towards debris avoidance, rather than mitigation - i.e., tracking and maintaining custody of debris, and maneuvering out of the way when necessary. This is pretty straightforward, since we already do a lot of space object tracking and maneuvering anyways. A variety of commercial companies have already moved into this space, including giants like AGI [1].
[0] https://docs.fcc.gov/public/attachments/DOC-354773A1.pdf [1] https://www.agi.com/missions/space-situational-awareness