Zone carries vs. the Matriarch kill
Raiding services split into two very different jobs. Zone carries are completions on a specific map — running its objectives, farming a target material, or simply extracting under fire from ARC and hostile raiders. The Matriarch is the other job entirely: a heavily-armored world boss that only appears as a rotating dynamic event, so you can't grind it on demand the way you grind a zone. If your goal is a fixed objective (a boss kill, a quest, a set of extractions) this is the right service; if you just want skilled backup for an open-ended session, the hourly companion play option fits better.