In FFXI you had no "Guildbank"

And read, not they where swallowed, they swallowed. They gave one of the newcommers a Rank 3 within their rank structure with his own rights, he somehow was able to promote someone to have full access to everything.

I know from WoW. If you were able to invite and promote, you were not able to promote someone over your own rank and you were not able to demote people with rank above your own.