I had a Etrade/MicroCenter deal where buying something worth of $400 or more and open an account and get the $400 back in your Etrade account.
I shopped at MicroCenter for $400 and opened the account and within 1 week I got the $400 back. Good experience.
Howerver, when I try to put more money into the account, the money never showed up, called Etrade, was put on hold for 45 mins and then they told me that they have never received the check. I immediately canceled the check, and stopped giving money to etrade. Right now I just have a little with Etrade, will transfer it out to my main brokerage account in the near future.
Though I got my money quick this time, but I dont' really trust them fully.