I think it is safe to estimate that one could easily generate $10,000 just in free play as a result of hitting 7*, as long as they compress their qualifying play into as short a period as possible (thereby maximizing ADT).
I've been thinking about this. The problem is that compressing it into fewer days is that you aren't taking full advantage of the tier multipliers any more (anything over 5k TC in a day is not tripled). So while you will have higher ADT, you will have to put in a lot more coin-in to get 7*.
$450k VP coin-in over 8 days (with min $50k per day) will get you there (45k TC + 80k multiplier + 25k bonus = 150k = 7*). I have no idea what their theo is on good VP but let's assume that it's 1% (if it's different just scale accordingly). So the 8-day plan would get you an ADT of $563 and it would cost you $2074 in EV.
On the other hand you could do it by playing $950k over 3 days. That would get you 95k TC + 30k multiplier + 25k bonus = 150k = 7*. Your ADT would be $3167 but your total EV cost would be $4370.
It seems pretty clear to me that reaching 7* is worth the $2070. The question is, is raising your ADT from $563 to $3167 worth another $2300? I would guess that is probably is, but I'm not sure exactly how their offers work.
Of course, you then have to actually make the necessary trips to collect on that free play. But if you also place a value on the free rooms / suites, $500 annual free dinner, etc., etc., then the value prop is clearly there.
I'm there anyway. Because CET offers are so freeplay-heavy, they are great to double-dip (you can collect freeplay there while you play a tournament at another property). Tournaments are harder to double-dip because you tend to run into scheduling conflicts.