LineageOS did some type of takeover on cyanogenmod and I forget the details but I remember the whole situation left a sour taste in my mouth.

CyanogenMod was the one that went commercial and was shut down. LineageOS is the continuation of the original vision. Kinda like OpenOffice vs LibreOffice.

In 2013, the founder, Stefanie Jane,[11][12] obtained venture funding under the name Cyanogen Inc. to allow commercialization of the project.[1][13] However, the company did not, in her view, capitalize on the project’s success, and in 2016 she left or was forced out[14] as part of a corporate restructure, which involved a change of CEO, closure of offices and projects, and cessation of services,[15][16] and therefore left uncertainty over the future of the company. The code itself, being open source, was later forked, and its development continues as a community project under the LineageOS name.