Meta works in Toa Payoh because the population is dense, phones are always in hand and people trust neighbourhood names. It fails when the audience is the whole island or when one ad tries to speak to everyone.
The town mixes older HDB flats, home to owners, tenants and renovators, with the landed and condo pockets in nearby Braddell Heights and around Braddell, so a single message misfires with one group or the other.
Many residents pass through the interchange and MRT daily, so ads are seen in short glances and the offer has to read in a second.
Property firms follow the CEA rules on what agents may claim, and trades work within NEA, BCA and PUB rules as relevant.