ps FirebrandX, the chess game you listed to show Black's best reply to B4 I think is not that impressive. White loses the B pawn in exchange for Black's E pawn! Not good!
I'm afraid your understanding of the game is still in embryonic stage.
I agree, and I would like to add that this is a good example for the general observation that MOST PEOPLE NEVER READ WHAT OTHERS HAVE CONTRIBUTED. In this case, fischerii did not read my several posts on 1.b4 e5.
At the amateur level I've noticed White often doesn't know the proper response to 1...c6 and I've gotten them to play 4. c3?! after 2. Bb2 Qb6 3. a3 a5. Instead 4. c4 is correct because of 4...axb4 5. c5 and if 5...Qxc5?? 6. axb4. The position is still perfectably playable for Black though after 5...Qc7.
This line is one of those recommended in Palliser's "Beating Unusual Chess Openings" and has the advantage of potentially surprising the surpriser. However you must also be aware of an interesting gambit with 4. Nc3!? i.e. 4...axb4?! (instead 4....d5 or 4...Nf6) 5. axb4 Rxa1 6. Qxa1 Qxb4 7. Na4 with numerous threats.