당신 can suggest a new banner since that would mean that 당신 are requesting a change in the background picture, but if it is not your own personal club, as in 당신 didn't create the club yourself, 당신 cannot change the banner. Only the creator of the club is able to do that. I hope this helped.
posted over a year ago
I believe the 질문 is about background images, not banners. It's asking why some clubs have the feature to change the background, whereas in others 당신 can only vote on 아이콘 and banner.
I'm not certain of the reason why, but I have an idea. When the feature which allows us to vote for icons, banners and backgrounds first emerged, it was only present in larger clubs - clubs with 100+ members, I believe. It was later expanded to clubs with 10+ members. Possibly, when the expansion was done, only 아이콘 and banners were added. The ability to choose a background image might still be only present in 100+ member clubs.
posted over a year ago
Actually, looking at the image 당신 posted, it can't be that since both clubs 당신 give as examples have over a thousand members. But one has over 10, 000. Maybe a club has to be that large for a background?