If you look at the service board or search through it for like last three years you will see that it is of recent that the casinos dominated but they were actually campaigns by other bitcoin related companies, my assumption is most of the leave after getting their assumed attention and also their weren’t able to cope with the ROI the advertisement of the forum was bringing, this could be that this brands are in high competition with each and some are not mostly used by everyone, because members here have preferences unlike casinos that are similar and you know the ROI gotten from this casinos can never be compared to a bitcoin wallet or something like that, that’s why the former actually still exists. I could remember when Best_Change were asked to increase their signature amount they specifically made that statement that they couldn’t match the amount paid by other brands like the mixers and casinos then due to ROI issue, I think this could be relatively what other companies also look into. So as times pass on most actually feel like they have gotten the audience they needed and moved on.

As for exchanges like centralized exchanges I don’t think they will actually gain the attention they needed here even if they advertised, I am not saying people here do not use centralized exchanges here on the forum but majority here frowns on anything related to KYC and as such it would be uneconomical for these brands to come to where their services aren’t valued that much