I think disclosing your bankroll still depends on your team.
If you decide not to, that's fine. As long as you are fulfilling all the withdrawal orders of the players and no problem in terms of this aspect.
Just don't offer rewards or promos that you think you can't meet with your current financial status.
Being active here in the forum is already a big thing. I hope you will address all issues, whether big or small, raised by your players.