We are still actively working on the spam issue.
Fediverse
GNU Social (previously known as StatusNet) is a distributed service provided created by The GNU Project to provide a fully-free network for social networking. The fact that it is distributed means that there is not a single service that you are locked to. A person who uses Quitter, for instance, can follow people on The Rainbow Dash Network due to them both using the GNU Social network.
The network software itself is much like Twitter, but the actual interface differs between implementations. Some websites, such as the aforementioned Quitter, are designed to look like Twitter, while the aforementioned Rainbow Dash Network is designed to look more like a message board, for example.
This is the only Social Network that RMS endorses, and the only one he actually uses (through a posting bot). GNU Social has no Code of Conduct but it is assumed you won't be a dick or else face the ban-hammer.