The introduceyourself tag is supposed to be used only once so the community can meet new users, some people myself included like to go around introduction posts and reward people for their first post to give them a quick boost and get them to stay around steemit, also some people do use auto-voting bots to vote for them and the bots allocate a portion of the reward to upvote posts under the introduceyourself tag without reading just to give new users a nice welcome. The problem is that nowadays people use this tag for basically posting anything so they can get an easy reward which is in my opinion an abuse (and some people don't even bother reading intro posts due to this kind of abuse). The reason I flagged you before is because I don't believe people should get money multiple times using the introduction tag which is why your reward on previous posts is down to zero(please note that you first introduction post which I consider legitimate was not flagged).
So to answer you question, no you shouldn't post multiple introduction, you do one good one and that is it. But if you decide you want to grow and be part of this community you can start posting quality content and people will eventually find you and upvote your work if they like it.
I hope it does answer your questions and if you want more information you can reply to this post.