I posted early in this thread of my experience to the "invite" only POSH Casino. I started with initial investment of $1,000 with no luck (9/2016). That happens. In December (2016) VIP host contacted me after about a 6 week absence and offered a generous bonus chip.
Thought I would give it another shot. I keep exact count of my bankroll. Over the past 4 weeks (Mid December thru mid-January) I deposited an additional $3,000. Ironically funded by winnings on another site. With over $4,000 deposited, and at least another $1500 in "bonus chips" I have never built my account to larger than $250. (Above initial deposit)
Do what you will with my experience; I have taken my play to other casinos.