Not the comps but the mailers
Thunderwalk, I do not recall where you play but most places do not give much in the way of comps to blackjack players who are smaller bettors. Where that player often scores is on mailers for free rooms, meals, match plays or other incentives that will be sent to you to encourage your return to their casino.
Also, since you state that you play for low stakes, unless the casino you play in is a real sweatshop (see definition of what is a Coast Casino or El Cortez) even refusing a card and being a red chip card counter will generally fall within a normal casinos "tolerance" level. An example at a higher level is a friend of mine, a green chip player who plays often at casinos owned by the number 2 empire. He plays at places where they do not rate players who bet less than $25, he spreads from about $25-$200, uses a card and has never received a backoff within this empire's casinos, but has been backed off at 3 downtown casinos, two Harrah's owned casinos and 3 Coast Casinos. So once you know something about the tolerance level of where you play, you might be able to use your card and count all you want without worry till you raise your overall level or something changes within the casino policy.
I play at a level where I usually expect to be evaluated. In some places the use of a card means that I can play without worry till I do something to get their attention or perhaps they back me off right away because of a note on their computer screen. In other places I will play higher stakes with no card, knowing I will probably be evaluated starting with hand 1. Sometimes the opportunity for perfect cover presents itself and I know I have bought a good period of time, other times I just play for less than an hour and leave.
So, in your case, I would suggest using the card for comps and mailers. You might look at it this way, 3 free nights is much more valuable to someone whose high bet is $100 than to someone whose high bet is over $1,000.
ihate17