Here is a section from the help area regarding the questions you are asking
https://logotournament.com/help/designer/77I cannot speak for everyone but I have a complete package that I send to each CH when I am the chosen designer. Minor edits are common when dealing with a new logo backgrounds color changes etc...however drastic changes revamping the entire design comes down to the individual designer if he or she will do this work at no charge or small fee it all depends on the changes and the individual.
hopes this helps