I was checking out the top ranked avns on a website called avnrank.com and guess what Desert Stalker occupies the second position. The first place goes to a game called Pale Carnations which features heavy optional sharing. This goes to show that when you make a game keeping in mind the preferences of a diverse range of audience it is bound to give you good results. I am sure if DS featured no sharing or any type of forced sharing or NTR the game would not have been as successful as it is today.
Pale Carnations doesn´t feature ¨heavy¨ optional sharing... yet. And I believe DS does have a bit more of swinging/sharing compared to the former, and it isn´t that much. Won´t talk more about PC because this isn´t the forum of that game.
I also think that it doesn´t matter if DS wouldn´t feature the sharing kink. We like the plot, the characters we either befriend or romance, the lewd scenes obviously, alongside all the mysteries and possible outcomes that may be featured later. That doesn´t mean the sharing kink doesn´t attract fans, because it does, but stating that it was just because of it that DS is in 2nd place at that site is wrong IMO.