@MrWooster dig what you're doing with Pkrsess. The challenge with any venture is figuring out when you have enough of an application to get it out the door, and I think you made the right choice launching when you did.
I would echo the sentiment of being careful how you monetize - especially give how clean and straightforward everything looks now. Tacky ads would really harm the experience. I think your marketing ideas are good though.
Signing in with twitter is a good option for this. It really says 'Get started now'.
Maybe you mentioned this earlier, but what hand converter are you using for this? It looks like the Deuces Cracked but you also seem to have the ability to filter on streets so maybe it's something more custom. FYI - I tested it out with some play money and it treated it as dollars
https://pkrsess.com/h/h.
Also curious to know what api/code are you using for comments. I'm not sure how I feel about if putting the comment box on the right. Maybe i'd like it better if you just had 2 buttons or popouts to the right of the hand that say 'add note', 'add comment' but then displayed the comments and notes on the side.
Nice work and good luck. Keen to watch your progress.