Gambling regulations will surely depend heavily on how gambling is considered by politicians, if gambling is just seen as an adult hobby, then you may be right and gambling ads will simply disappear from events that children and young people are expected to watch, however if gambling is considered to be bad for people regardless of their age then we may see a complete ban on gambling advertising, a scenario similar to what happened to tobacco.
Gambling advertisements will continue to exist because of the interests of many parties, including politicians. Some politicians also own casinos so they want to see advertisements about their casino. So even though there is a ban on minors, gambling ads for adults can still run because the ads are specifically for adults only or people who don't apply filters.
Things that are meant to spread will spread no matter what someone does to prevent that from happening. Tobacco advertisements are banned all around the world, but does that reduce the number of smokers? It doesn't, in fact, they keep increasing over time because there is no need for any advertisement for cigarettes to get to people, everyone knows where they can get them and they do that regardless of the fact that they are harmful to them.
Similarly, no matter how much government works on banning gambling advertisements to reduce the number of gamblers and gambling addicts, it is a kind of a thing that will spread anyway, the only difference is that who knows which platform one would choose to start their gambling journey.
That is the impact of an advertisement that can attract more people to join. Gambling ads are also like that, so maybe if the government reduces the broadcast time of gambling ads, it won't stop people from quitting or reducing their gambling time because they already know much about gambling. So it is very difficult to ban gambling advertisements, especially if people very well know gambling because they will return to gambling again.
Yes bitcoin forum is completely independent. It does not operate any gambling sites so no government can file any complaint against it. However, where gambling is illegal, the government will impose various restrictions. Everything related to gambling in those places will be viewed seriously. I think the government cannot create any such obligation regarding gambling advertisements on social media. However, if governments want to, they can certainly regulate gambling at the national or local level.
Unless the government suppresses people on forums and bans gambling ads from appearing on these forums, but we know that the bitcoin forum is independent and not related or bound by anything, so many ads appear on this forum. The government can easily regulate gambling advertisements that appear locally or nationally because they are all under government regulations, so they have to obey the government's wishes.