does playing only even money bets make casino review your bonus faster

so i’ve been grinding bonuses on a few spots lately, and i mostly stick to even money bets on roulette to stay within the limits and play it safe. someone told me that casinos might catch on quicker if you only do red/black or odd/even, like their system flags it as bonus abuse. i do mix in the occasional dozen or corner, but mostly just want to clear the wager fast without busting my stack.

does anyone here have actual experience with this? ever gotten reviewed or had payouts delayed just for playing it like this? or is it really just a myth that even money bets are watched more closely?