@dabone - Your daily builds are growing in size because they contain multiple versions (days) of each .exe. I understand including four versions of the .exe but now you have different date builds in the zip file for each .exe version too (10 .exe files).
09/03/2018 11:03 PM 30,188,544 attract-64console_09_04_2018.exe
09/04/2018 11:03 PM 30,188,544 attract-64console_09_05_2018.exe
09/05/2018 11:03 PM 30,188,544 attract-64console_09_06_2018.exe
09/03/2018 11:01 PM 29,083,136 attract-86console_09_04_2018.exe
09/04/2018 11:01 PM 29,083,136 attract-86console_09_05_2018.exe
09/05/2018 11:01 PM 29,083,136 attract-86console_09_06_2018.exe
09/03/2018 11:00 PM 29,083,136 attract-86_09_04_2018.exe
09/04/2018 11:00 PM 29,083,136 attract-86_09_05_2018.exe
09/05/2018 11:00 PM 29,083,136 attract-86_09_06_2018.exe
09/05/2018 11:02 PM 30,188,544 attract.exe
I should also mention that your new zip version has picked up multiple changes in the past week alone that your old version wouldn't have (files in the language, layouts and shaders folders)!
P.S. Obviously my file times listed above are off by one hour (which looks like a day) vs your actual build times due to our time zone difference.