> I hadn't heard this was a feature that you could self-exclude / ban yourself from the main apps.

The other way you can self-exclude or ban yourself from the traditional gambling apps is just win too often.

By definition if you use traditional (non-'market') gambling apps and aren't banned by the owners of them then you're statistically a loser or at best neutral over time.

If you were a winner over time they would ban you to stem their own losses. They are legally allowed to do this and do it all the time.