I finally bit the bullet and signed up. Like you say, it's hard to trust something being given for free when there's usually a catch. I guess one way to look at it is if the catch comes, then I can just leave and nothing is lost.
I see you're mentioning children's accounts. No age was asked for when I signed up though, so how does that work? Is there an age limit for children?
There is no age limit yet children often are difficult to verify...especially younger children.
The goal with that wallet program is to have non profit organizations that deal with 5-8 year olds, as an example, verify them.