You as a customer who make the rules! So
DON'T hire anyone until you see 70% of the work that you want, then pay ! if the person that you are going to hired not agreed about that! then that means he/she is not professional! and will give you poor work! thats why he/she will ask you to pay first ! so don't do it !
NOTES 90% of people here is SHIT! and just wasting your time and money! the first person YOU SHOULD AVOID is : MADAM EASY ! he call himself MADAM TOO! what else you expect from a man call himself MADAM!