I like projects which have a social impact and this one is spot on.
The concept of allowances is key to make sure youths understand and values the basic economical principles and lays a foundation for future responsibility of ones economy. In a society which is moving away from cash management this makes it more easy to delegate micro tasks and also ensures that the one doing it get the "monetary" feedback.
Also, it is fun.
URAllowance can be something kids brag about to other kids.
Hey my family is very tech-savvy and they are paying my allowance through smart contracts

I guess it could in fact spread quite fast among kids. As far as i understood then there is no date set for the starting of the sale. Is this something that will be decided soon or is it still uncertain?