How does the 1% monthly payment plan work in Dubai?

Popularised by Danube, you pay about 20% upfront, then roughly 1% of the price every month during construction, with the balance due at handover. On a AED 1,000,000 apartment that's AED 200,000 down and around AED 10,000 monthly. It spreads cost without bank interest, though the instalments are higher than they sound and a handover lump sum still applies.