I can guarantee I spend no where near $10,000 in the casino! I saw some who do however. I usually bet between 80 cents and $1.60 on slots (if I'm winning on a rare occasion I might bet up to $2.50). For me, I probably spend more time in the casino than the average person. I like to play in the evenings and on sea days. Slot machines will get you more perks than playing tables, keno or video poker. My BFF plays keno and bets way more than I do and she never gets as good of offers as me. My DH plays the tables and he doesn't get good offers either. That's our experience anyway.
Also, post covid the offers are coming seem to be much better than pre covid. Probably has to do with PCL trying to fill up their ships (my guess anyway).