You would really only need one or two, but the key is that the owner has to have you in their WoT.

For example. I follow nostr:nprofile1qqsfln36agetx43hsw8mgkm4hce9j46zu94m8er59nyzhv74p7gg0espzemhxue69uhhyetvv9ujuurjd9kkzmpwdejhgqgjwaehxw309ac82unsd3jhqct89ejhxqgcwaehxw309aex2mrp0yh8xmn0wf6zuum0vd5kzmqf83v6s but not you, but if nostr:nprofile1qqsfln36agetx43hsw8mgkm4hce9j46zu94m8er59nyzhv74p7gg0espzemhxue69uhhyetvv9ujuurjd9kkzmpwdejhgqgjwaehxw309ac82unsd3jhqct89ejhxqgcwaehxw309aex2mrp0yh8xmn0wf6zuum0vd5kzmqf83v6s follow you, then you can use mine.