"[...] I thought about implementing a feature where you transfer files to a group of servers [...]"

[DerDu]

"Hi ######, For now the plugin supports synchronizing the files to only one server per configuration. I thought about implementing a feature where you transfer files to a group of servers but I wasn't sure what value it will add to the plugin. If you think the idea will be a good feature for the product, please open an enhancement request at https://github.com/fioan89/sourcesync/issues"
Source: https://plugins.jetbrains.com/plugin/7374?pr=idea (i'am not the guy mentioned)

YES! Feature requested! ^^