If "Reckless Greed" is activated, causing you to skip your next 2 Draw phases, and you also must skip your Draw Phase due to another effect such as "Offerings to the Doomed", the skipped Phases do not accumulate. So if you activate "Reckless Greed" and "Offerings to the Doomed", you only skip 2 Draw Phases.
Skipping a Draw Phase is an effect, not a cost, so if "Reckless Greed" is negated you do not skip your Draw Phases.
Trap|
Normal
Limited