How to join more than one guild at a time?

[ARecoveringCynic]

Are you able to do that or am I just crazy? After joining the Merchant's Guild, I'm unable to go back to the menu that displays all of them

[MountTai]

You can't. At least not in the stage of the game where I am at, not sure if possible later on. But at the moment you can leave the guild and the multiplier will increase. This multiplier will still apply even if you pick another guild next.

The only thing your missing out on is the milestone boosts that you get (from pawn to king). The idea is to stick with a guild till you get a decent increase in its multiplier and then go to the next guild. And kind of juggle between them to get both the multipliers up.

Basically leaving a guild is the rebirth mechanic in this game if your familiar with idle games.