Mh-hm, this is hardly uncommon. I'd wager it's because starting a guild is usually not that hard, and it's only a game. So people create them left right and center, often with no vision or game plan. Thus resulting in dozens upon dozens of these superfluous, water-treading guilds that are little more than a chat room. Sooner or later lethargy sets in, players start leaving in descending order of ambitiousness, the creators themselves lose interest, ... And voila: you've got yourself a nice husk of a guild.
Note that these guilds can be fun though, if you enjoy the company! Pretty much every guild I've ever been in was one of these after all. But if you want more than that (raiding, group activities, ...), I would advise to move on to a guild with a bit more renown. Yes you can try to pull one of these guilds from the drek, but it's generally pointless and thankless.