Whoever owns a gambling business needs to do marketing, yes the mindset when sharing gambling stories are to raise awareness and attract more customers which is descent for a business. The bad part are those who forges story lines and manipulate winning tickets just to brand the platform with a high winning rating, manipulatively attracting more gamblers.
It’s very for the casino to forge story just use it for marketing purposes these days. Most of the games now have a replay or verification page to check the authenticity of the winning games so casino use a transparent result for sharing success stories.
Maybe this is still happening through influencers work but not the casino forging results.
Casino use bonuses as way to market their casino. It’s more effective than sharing success stories nowadays.