It worked. Nowadays it is not easy to see this kind of ads anymore.
As are ads for just about everything.
It isn't just the products they push. The ads themselves are toxic and are pervasively blighting our lives (and probably shortening our physical lifespans as well).
Seriously these should all be drastically curbed all across the public (physical) sphere, as has already happened in some places (e.g. São Paulo).
Some day, very far from now, when humanity finally realizes this -- we'll look at the saturation of advertisements in the 19th-21st centuries like we do on the haze of rampant air polution, pervasively contaminated water, horse manure (and dead horses clogging the streets) of bygone eras, today.
I doubt a ban would happen, though. The worst offender for eyesore gambling advertisements is the state-run lottery.