Wouldn't say 169 is a low number of players I'd rather say they are amongst most succesfull crypto dice sites around in terms of players attending theie site daily.
What would be very interesting is knowing are some more numbers about their business: like daily wagerered, number of bets, profits and consequently have them listed on dicesites.com
You can get these stats right from the site
The total number of bets is shown in the upper right corner, and proceeding from this number, you can calculate how many bets people make on day-to-day basis. The daily wagered amount can be obtained as easily. Just follow the daily race results, sum up all the wagered amounts, and you will see the total wagered amount, give or take. Profits are a little bit trickier, but if you are familiar with the ins and outs of the industry, I think you can get the approximate figures too