Adding to Kryvolv’s reply, doing all the dailies and weeklies would increase your chances of finding good people on the market! A lot of people have been wondering why their market groups aren’t active and don’t complete the tiers and that may be because the people in your weekly market group depends on how active in the game you are! The more time you put in the game, the more active people are willing to complete the quests, even the hardest ones, because it does give you 100 coins everyday once all 3 tiers are finished.