They are excellent points of view, however, the point that indicates that with 100usd in Betfury you can get more is something that attracts much more attention and is remarkable, if we take into account the number of people who seek to play to win they're going to go for what seems easier to them, and if you spend less money and can get more in prize money, then it's pretty obvious that the best is the way to go.
There are platforms that have different types of promotions, it is something normal, what happens is that there are more powerful sites in terms of having more customers, more traffic, and other sites that do not have these characteristics but in some way this is part of the competition , and you have to see it as a healthy competition.
Good point, a kind of competition where gambling house are trying to attract gamblers to use the platform, well-established gaming house provides perks that keep their customers to keep coming back, while others have some decent promotions the competition gives gamblers other options in case they wanted to try other things aside from the regular games or platforms that they are using.
Besides, those promotions are additional. It's up to the gamblers whether to participate or to just keep playing and enjoying the game
that they are attached.
Nothing will change aside from that good opportunity if luck permits you to win after taking a good shot with the promotions.