In light of recent events we have decided to clamp down on advertising, particularly when it comes to other Tekkit Classic servers, it's unfortunate that we have to do this but most other servers are stricter than we have been and we have seen a rise in complaints about certain players advertising over the last few months so it seems to the only logical step to take.
As of now advertising another TC server is an instant and permanent ban, without exception, whether this is done in chat, private message or using more underhanded methods.
I have updated the in game rules list to include (Instant Ban) after the no advertising rule.