In the spirit of making this giveaway as widespread as we can and putting XLM in as many different people’s hands as possible, we set a limit of one XLM distribution per person. That is, a single person can only take advantage of our XLM giveaway one time. Identity verification will allow us to ensure we put XLM in the hands of as many people as possible by preventing people from claiming XLM more than once.
Identity verification is not required to use the Blockchain wallet. It is only required for becoming eligible to claim XLM and for exchanging between cryptocurrencies within the wallet.
If you'd like to learn more about Stellar and its native asset, XLM, check out this article.