It's been announced on the LOTB Facebook page that we can get 150 free ironite, as a thanks for our patience with the recent freezes/hangs/errors, by using the following redeem code:
K4ZRG-XJ79E-5VGUB

To cash in the ironite, go into options (the gear wheel in the top right corner), press the "Redeem Code" button and enter the code.

This was announced 8 hours ago (August 16th 2017). No expiry date for the code has been given.