Can you create a ranking system that shows the top winners of each month/year for low, mid and highstakes publicly? This is what got me most into poker, seeing that people can consistently make money with it, that it is not purely a game based on luck. Also this way you could reduce the "anonymity" of your site by displaying the "real nick names" in the leaderboards and give your site some "personality". You could also create content this way and rewind on youtube the biggest pots won by this player for example.
On a side note: I also would accept a job offer if you like my ideas. To demonstrate my skills I kindly refrence to my ability to forecast the future:

https://www.runitonce.com/chatter/dear-mr-phil-galfond/
"Phil Galfond not replying to this thread means he is actually serious about this topic and we will see a new pokersite coming up in 2016/17. You can quote me then-"

Best regards,
Lausbub