Now and future, more and more online card games is/will develop. Yet the cost of rescue is remaining the same. This is bad.
The cost 300 gold(~US$3) per rare is expensive to most player view. As online card game is just electric data, most expect cost is much lower compare real card game. Also as economic is going bad for most country, the willing/demand on spending money on such game is lowering. Yet cost on games still remain same, and substitute games is increasing.
As rescue is gambling per US$3 and hope super rare, and if fail player are decourage and angry to the game/GM. Starting put bad comments, etc.
-Drop cost per rare rescue(gambling) to US$1 or lower. Thus player will felt less hurt if they don't get what they want.
-Change risks: For US$1 for chances of 3-5 star rare, US$2 for chances of 4-6 star rare, & US$3 for 5 or higher star rare.
-special year events rescue. Ex: a week before and after new year (2week range), player are given chances to rescue(Gambling) (limited) 5 (or less) rare for cost of 300 golds, etc.
-Event rare cost reduces.eg: this event some special skill rare cost 300 gold each (too expensive), yet many player like and will attend such event. So cost for such rare should to US$1 each or pack of 6 for US$9 etc.
Thx you for reading my suggests. And hope GMs will consider.