i like it
how about some active bonus for each player and/or guild as a while for “days being in guild” count?
example: a lottery ticket, given 1 once a week to each member who is in guild for 10 or more days
the ticket is like guild chest but the chance to open mythic increases with player personal in-guild days count
example: whole guild gets a bonus stats for having total days in-guild: 500days +1 life, 2000days +1 attack, 5000 days +1magic
things like that
edit: now that i think about it maybe it should include a bonus % to gold gain for a personal day count instead?