Back when the Forbidden Temple MO maximum level was 88, basically most of the people doing the dungeon were in the level 86-88 range. When the maximum level was randomly decreased, I realized that this kinda ruins the main MO dungeon way to make gold at that level range of 86-88, especially because it was the only dungeon MO that everyone was doing (There's a few other dungeons that you can do, but I don't see people doing them as often as FT. Basically I don't see many people do parties for them publicly). Also, now I don't really see anyone running FT anymore because of this.
The only other options (to make gold; dungeon-MO related, the popular public-party dungeons) was to make an alt which would run MO dungeons at lower levels (PT, BFR, etc), or to level up to do some of the higher-leveled dungeon MOs that people would do. I'm not even sure if there was a reason for lowering the maximum level to open the MO. Oh by the way, the MO still says in the description that the maximum level is 88 even though it actually isn't.
(Note that I'm only talking about dungeon MOs. Don't bring up like 1 million other ways to get gold such as selling items)
I hope I said this clear enough.