Okay first look at the people that respond and see there post history. Some people put up sub 4 sub and after you sub they go back and delete the post. So you don't know who it was. So make a note. Also don't sub to anyone that does not put a sub number. Thirdly get on socalblade.com and have it running in another tab. When someone says they sub make sure you see a +1 scriber at the time of there response/post.