I'm out, but had a good run. They closed my account today @ $70,000 spent by credit card. The cancellation doesn't say anything about why the account was cancelled, just that I can't make any additional purchases.
They sent me a first warning notice when I had manufactured spent approximately $45,000 and after that I slowed down the pace and held the stocks at least a day. I thought the trigger might have been my buying and selling on the same day, which is what I had started doing when I got the first notice. I guess it is isn't just that and, from what others have posted, it seems like the threshold isn't an amount but just a subjective view of your account. Oh well, probably could have maximized this a bit more if I opened more cards (just opened two), held some equities longer term and spread out the purchases over months. Then again, the credit card option might be dead very quickly too -- just no way of knowing.
Here is my earn:
Southwest Card - bonus offer: 50,000 points after spend minimum
Barclays Card - bonus offer $440 for travel expenses after met spend min.
Earned an additional 60,000 Southwest points, so a total of 110,000 -- value at 1.43 cents a points = $1573 Southwest credit total.
Earned a Southwest Companion Pass (unlimited free travel for companion) for hitting 110,000 points -- good until December 2015 -- value at ???
Earned an additional 10,000 Barclays points -- value at $550 travel credit
Earned $311 on stock appreciation
TOTAL -- $2434 TRAVEL CREDIT and a SW COMPANION PASS
Thanks Cowstash for the tracking sheet. It was invaluable.