This reddit thread has the maker of the free wallet product.
https://www.reddit.com/r/ethereum/comments/4jmk1g/warning_to_1000_users_of_ethereum_wallet_by/
The topic starter on Reddit provides no actual information on any scam activities related to Freewallet because there are none. We're one of several custodial wallets on the market, the service model we use doesn't make us or Coinbase, for example, a scam. This is an open & decentralized market, people are free to evaluate the risks and make their choice of this or that service by themselves.
The reason we believe it's not feasible to provide private keys to individual wallet addresses is because it would prevent our users from taking advantage of our secure cold storage technology to safely store their funds. We're currently working on a way to enable exporting/importing private keys without losing the benefits of the cold storage technology we offer; this feature should be available soon.