First begging won't get you promoted.
To become a crew, which has a few more ability but also a few more responsibilities, you must be active and helpful in the guild.
Vice captain is a very big role to fill, they can do everything a captain can but delete the guild and forums, and edit guild information. To become a Vice you must be EXCEPTIONALLY helpful in the guild, and also a big part of it.
Crew-15 or more posts, donated money, is recognized as a good member.
Vice-15 or more posts, has donated a large sum of money, is recognized as a awesome member!