I guess "very very poor" is subjective. Anyway, yes, b4 my mum has little cpf due to less stable job. Then became a home maker, then restarted her "career" very late; which explains for little cpf.
The scheme participation is auto n doesn't require one to "apply". Also govt will check (maybe via cpf agency) her age, income, housing type and cpf (somewhat I think those under BRS or with contribution under 150k).
Yes, I did some topups to her cpf b4 but alas, I also not rich, so not enough maybe. And yes, the scheme is indeed helpful. At least she can shop abit at JB, to pass time and also "contribute" to the family.
Lastly, there is another scheme by Comcare for those who unprivileged or have financial difficulty and it's as a family unit; which is good, for the nation and community, socially and economically.

So on top of this, for the rest of us, we just earnestly wait for the budget/payouts for 2025 la.