You can check this out for yourself. https://www.smartbillions.com/stats
My thoughts on this are:
1. Until cryptokitties came out the lottery was steadily increasing, with the most traffic on weekends. Since then, ETH network is congested, network fees are high, and barely anyone plays the lottery.
2. The developer has a 0.25% weekly or monthly (don't remember which) budget of the total jackpot for marketing the lottery, but apart from adverts on bitcointalk, I don't see any marketing activity going on. Would be nice if rumipl could update us all on the progress, he has gone silent recently.
Nevertheless - I'm holding strong. Sticking it out for the long ride - fingers crossed