If you want to spend money to support the game and make people happy, you buy treasure battle potion. Thats good for you, for your opponents, and its all perfect...
But the partners.. yeah, maybe for FM if they would be permanent, i would buy one too, since the art is cool as usual, but i dont need game tips, i dont feel lonely, and in general i dont like limited/timed things (i'd buy one just for the art if they were permanent).
Maybe if you could use the partners as a sort of reminder for yourself? Like writing notes for its speach, and it could tell you them during the battle.. I'd be glad if the Partner reminded me to use Petrification before my Song Sorc SS activates, or if it kept short notes on strategies playing orders, because i tend to make lots of small mistakes during matches.
Something must be wrong with me. I'm giving advices to someone i should kill.