Can you read?  This question has been asked dozens of times already in this thread.  The only people that can tell you when and if this will get added to Polo is Polo.  Why don't you go spam the troll box there and ask when it's going to be added to Polo?  But to be realistic, what would being added to Polo do for Stratis at this time?  The platform has not been released yet. I'll go out on a limb and speculate that Stratis will not be added to Polo until the platform is released, verified, and known to function as expected.  The current wallet is just a temporary bitcoin clone used to distribute the ICO, bounty, and signature campaign funds.  Until the Stratis platform is shown to be working and a new wallet based on that platform is released and proven to work Stratis is not going to do much of anything on the exchanges.  After several high profile ICO's that generated significantly more btc than Stratis but have yet to deliver on what was promised most people are going to stay on the sidelines rather than tie their btc up with something that hasn't yet proven itself and who's development has just started.  The only thing we have at this point is a temporary bitcoin clone wallet, a white paper, and promises. 

If you go back a few pages and read the thread you would know that the funding for development has just been released to the developer and they would be starting development this last weekend.  Until there are some tangible results and development Stratis will likely not be listed on Polo, the volume will remain low, and investors will stay on the sidelines.