After 520 days playing, I finally got my first rainbow from a daily summon. I am sure that I did way more than 400 daily summons.
I know that I may be an extreme case, but I think that it shows how important a pitty timer is. The only reason I didn't give up on dailies is stubbornness.
Before the 3% rate I had only 2 rainbows, Ramza (of course, useless for a looong time) as the anniversary free one and Olive as the free compensation.
Nowadays I have a good number of rainbows and it is way more fun to play.
RE: A Bit Curious Contest #2 100 SBD in Prizes - 7-10-18