It's happened: my offers from Harrah's Rincon have dropped to such a low level in September that it no longer pays for me to drive there for a daily drop-in visit. My weekly free play has now dropped to a low of $55 which is barely enough to cover the gas expense IF I am lucky enough to get a 90% return on the money.
I do have a cash back from previous play of $285 which makes it worthwhile for one more trip which I can combine with a weekly offer and one daily offer either. Which means if I plan my trip "right" the one trip would have combined free play of about $425... and then that's the end for me.
Instead of making weekly trips to Rincon, a once a month trip to Caesars Palace in Vegas for a once a month $1,000 offer makes much more sense.
Adios.