Is the Arlington Super Hi 5 a "jackpot" bet?
 

I'm asking because I don't know much about it. I heard the replay this morning and Steve said that it's over a half million, but that it paid $306 on Wednesday.

So I'm assuming this accumulates a pot until one lone winner gets it, making it a jackpot bet.

Are there Super Hi 5's that are run more like a superfecta (divide total pool among all winners) ?

Yup.. 'Unique ticket' winner style play.

The Hi-5 was designed with a carryover concept when conceived at Santa Anita from a players focus group. The Arlington version is the first that added the single winner wrinkle.

when is the mandatory payout on this?

until then it's a horrible bet imo