It happens often to me that I see two emails from FreeBitco.in in my box, and I claim two free spins of WOF, one after another.
BUT, it's not that I receive 2 free spins per day. Since
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Yes, I know that because it also happens to me that sometimes there is a day when I can not spin and I can only do it the next day after spinning the spin received the next day. In the case that @NJ89 shared, he said he received two emails within 24 hours, or maybe the one mail did not have a free spin but he said that they had both.
Exactly, all emails listed in the screenshot I posted contained 1 free spin each. On average, I get 2 per day. On the 23rd I got 3, but on the 21st I only got 1. So there's a slight inconsistency, but I'm still very happy...