I am stoked, but it will be a fraught process. Right now it's being rolled out as "a payday loan alternative"---i.e, it's for poor people.
Historically, trying to avoid political battles by making services poor-only (whether means testing or otherwise) has been loosing strategy as the Republicans let it through (battle win!) but the service becomes shitty and paternalistic without a strong broad electoral mandate.
The key is making something just about everyone will want to use, letting people vote with their feat, and then it becomes untouchable.
We need the accounts to make UBI stick, but perhaps we should think about it the other way too. Next crises, don't bother with people's existing accounts and instead say "there's a check waiting for you with your already-existing PO account".
Just like Facebook getting people to make shadow account for their friends and spamming you to claim in the olden days!
Develop the code in-house, and it will be guaranteed open source for!