The problem with zip is that you can't be 100% sure that every user is able to extract the zip file.
If you use zap you have the warranty that every BlitzMax owner also owns an unzap-tool.
The zap file will be extract directly to the mods directory where it should go, so the user doesn't have to copy it manually.
If you want to have a better possibility to update the modules later on, you could create an own module server. The user then receives the module using the standard syncmods-tool.
To create a module server you just need a webspace which is able to execute php files you've written and a little knowledge how the module synchronization using http works.
If you use zap you have the warranty that every BlitzMax owner also owns an unzap-tool.
The zap file will be extract directly to the mods directory where it should go, so the user doesn't have to copy it manually.
If you want to have a better possibility to update the modules later on, you could create an own module server. The user then receives the module using the standard syncmods-tool.
To create a module server you just need a webspace which is able to execute php files you've written and a little knowledge how the module synchronization using http works.