Why? Especially for the Glimmer grind ones. It costs so much for the mod that it’s almost worthless to put on- you’d get more by never equipping it, for a long period of time anyway. This feels like a bug to me, all other mods are 500 Glimmer.
Funny thing is they used to be 500 and weapon mods were 5000. For whatever reason this season Bungie reversed the values rather than just making them both 500. ¯\_(ツ)_/¯