Bitcointalk is a popular forum and the advertisement on bitcointalk attracts a lot of attention to the project. Coinplay.com is a crypto casino and many users of the casino visit bitcointalk forum and get information about casino from this forum.
There is so much information about crypto on this forum that it is not wrong or the right choice if a company advertises their project on this forum as a form of promotion.
Coinplay as an example of a new crypto casino company that chooses to advertise here. Maybe Coinplay.com can feel the positive impact so far.
Many people who used to bet at casinos with fiat currencies are now interested in betting at crypto casinos. They are constantly looking for information on how to play and others to understand it and this forum is the most popular and active forum.
You can recommend your friends to advertise here. Who knows, you may be planning to do so yourself.