You can join the guild I'm in, Splintersbane, if you want. There's currently a lot of inactive players so there's a lot of slots for brawl. You can get your slot every week and slowly grind for gladiator cards.

There's also no mandatory donations. If you want, you can but it's not a requirement.

What's in it for me? Simple. The more players in the guild plays brawl, the higher the rewards for everyone. If you can be active in brawl, that would be much appreciated.