I'm not a GM, but i'm in a guild that does this. The rules say you need 100k to stay in the guild each week. The guild doesn't do random invites, an officer discusses the rules (especially the 100k) with each member before they join. There are discord announcements reminding people of the 100k requirement. There are events to help people get the 100k.
If you get 50k, it sucks that you have to get kicked even though you qualified for the guild conquest reward. But what is the alternative? If a guild wants their members to help the guild remain competitive, people earning 50k aren't gonna cut it. I get 50k by logging in once for 30 seconds. If i login once a day for a minute, i can get 500k conquest a week. People aren't contributing to the guild at 50k (in terms of securing a conqueror title), they aren't making the guild feel active, they aren't helping the guild get the conqueror title, they are being carried to victory by other players, and doing the bare minimum.
With the new conquest changes from a couple months ago, 50k is extremely easy to get. Like i said, if you want to just make your 50k and you dont care about earning the conqueror titles, that is *fine*, just don't join the main guilds, join the alt guilds (or any other large yield guild). If you join one of the top conquest guilds on the server, ones actively trying to secure conqueror titles, you need to be competitive and do more then the minimum. People shouldn't expect otherwise. Why should people get rewarded with a title when they didn't put in the work to earn it?