10GB is 10,000 MB, over 30 days that's 333.33MB per day, not 1.77gb?
per hour that's 13.88MB, per min that's 231.5KB, and per second that comes out to 3.85KB.
in a very populated sever (red pizza 9 for instance), with a few people on the map i was in, it was sending like 55KB/s.
in a very unpopulated server, idleon is using maybe 20 bytes (between send/rec) combined per second.
so the majority of the data usage seems to be player driven, Lava likely is sending needless amounts of data about the players every frame. i wouldn't expect something like this to be fixed because it is complex and isn't something that can be easily "fixed".
i don't see anything bad happening here, just ineffective code but i wouldn't expect someone to have master class mmo code for a single dev game.