That's for sure is the big advantages of those who got a huge amount of bankroll, the kind of privileges when placing bets and gaining additional perks and promotional stuff from the house which is far different from a small to the regular gambler, and like what you just mentioned, it's better to treat this venue as a source of entertainment if you don't have that huge capital to spare.
It will save your finances not to take this place as a source of your financial resources.
The thing with staking big amounts is that the outcome is always huge compared to staking smaller amounts which will give you a smaller reward vis-vassal, same as odds accumulation some casinos offer a boost for you in percentage if you accumulate multiple odds, in one of the local casinos I make sports bets I am always given a boost in my odds when I reach a Certain amount of odds accumulation, just like we have with stake amount as you mentioned.
There are many ways casino rewards their big wagerer/stakes and the above mentioned are just a few among the rest other and only the players involved can take note of this