You do get guild quests with less than 10 active members in a guild.
My very small guild have 12 members in total, out of which 6-8 are active. We get guild quests every day, and need 5 to 7 to complete it. Which we manage to do every day too. Except for the [censored] one that requires us to hand in wagons, as those are so expensive to get. I always cancel that quest
Please do not use profanity in posts
MOD_Daz