is it because afraid of siblings, parents or girlfriend noticed it ?
or dont wanna let your workmate, colleagues know that you addicted to gambling ?
If you advertise some casino and you are receiving money for that then you are not gambler you earn with your profile page on any social network. And here no one will see you ass a gambler, close people can just get bored from your activity.
Sharing your gambling wins and loses, along with videos about it have some other meaning and you will find people who agree and disagree with that. If you feel ashamed because you gamble then don't do it, but my opinion is that if you doing something that you like you don't need to ba ashamed for that.
Posting and sharing about things like gambling even though you are not a gambler will still give you a gambler image from your friends or family. Because they don't what really the truth and you will not share things you don't like even though you earn money from. I never share any gambling post on my personal facebook, I used dummy accounts to share any gambling promotion to hide my identity.