Maybe I have not played aviator in particular, but according to the description by op, I think this is some sort of another remake of crash game.
Crash game is very popular like I believe most of us will agree, and personally from my own experience, different casino this days have their own specialized version of crash game, so for me, the aviator game op is talking about may just as well be another version of crash game.
Anyways, majorly all casino and slot games this have a demo version that a gambler can play without risking a dime, so for me personally, I don't consider this feature on the aviator game a selling point, since it's some thing that a gambler can do with almost any slot or casino in-house game.
I am not sure but it seems to me OP is trying to advertise some service/casino in a very passive manner. (not explicitly saying he is advertising). Anyways...
I have seen several casinos and most of them of course include their crash games, but I was not aware there were some different variants from what I would call the "classic" crash game we all know and like. I have not clicked on OP link, since I can be a bit paranoid on clicking stuff shred by anyone who is not a known member of the community. Otherwise, I would let my curiosity to drive me and take a look at it.
Yeah, you are right, the way op presented his or her argument or post does explicitly look or feel like he or she is promoting a service, one possibly built by him or herself, but then, I personally wanted my comment to be on a general side or level, not to focus to directly on how I felt the op presented him or herself.
And speaking of crash games, yeah, I wouldn't say it if I wasn't sure, I personally have played different variations of crash games, ones a bit different from the classic crash game we all grew up with and are used to, though this difference is mostly the design side, that is, in the UI/UX mostly, not in the game's mechanics or operability, as I personally believe that what ever utters the mechanics of a game, then possibly, a new game will be born.