Originally Posted by kringley

It's a teaser price. Next one is 300, then the option is gone. At least if it's the button I'm thinking of on the gacha.

It resets every fortnight back to 100. That is how I mostly support the game - every fortnight, I do 1x 100 NG Limited and 1x 100 NG Premium draw, leave the 300 price draw and come back and do the 100s again the next fortnight.