Noticed this old RoomiPay thread. It's still alive - between 50 and 100 of the first payments each month are still fee-free, then a sliding, increasing scale after that.
One change being considered this month is making payments ACH only. You would still fund with credit cards and earn miles/points, but you'd have to have ACH info for your landlord. Would that affect wanting to use the service?
More info:
RoomiPay to require landlord ACH info this month? | MilesTalk ? Frequent Flyer Miles and Points