Q:
Fractal daily
A:
http://wiki.guildwars2.com/wiki/Fractal
“Similar to explorable dungeons, individual characters can receive daily rewards for completing the Solid Ocean Fractal in each factor they have unlocked. This daily reward chest includes a Bag of Coins (which contains 2 to 4 silver), a number of Fractal Relics, a chance at a bonus Ascended or Fractal item depending on the factor level, and a Pristine Fractal Relic at higher fractal level. Thus, a character that has unlocked difficulty 30 could complete 4 fractal dailies each day, one each at even numbers from 1 to 9, 10 to 19, 20 to 29 and 30. "
You get daily chest once for each tier (2-8, 10-18, etc.).
As for alts and dailies – I dunno.
Every ten fractal scales count toward a different daily. So if I have a character at scale 30, I can get 4 dailies. One at 2, 4, 6 and 8, one at 10, 12, 14, 16 and 18. One at 20, 22, 24, 26 and 28. Last one at 30.
An alt will be on a totally different system. One character’s dailies will not affect another. So you can do your 10, 20 and 30 dailies then switch to an alt and do those same dailies.