It's a Pre Order. December deliver is not a gurantee, look at all the others, Alpah, Tech, Flower tech, Fib, KNCminer, late on their deliveries.
IF is gets delivered in December (during the holidays, which we know is the best time to ship anything!!!). that is 3 months from now. That is like 3 years in the non crpyto world.
Will it ROI. Well Difficulty is near 36,000 right now. Where was it 3 months ago? Oh head 15,000. It went up 140%. So by December the difficulty will probably be around 86,000. So how long does it take a Bitman L1 to ROI at 86,000 difficulty? Based on current LTC BTC prices... 178 days. And this is assuming that difficulty will be fixed at 86000 for the 178 days. If we assume a modest 2% increase we are talking 239 days.
Will it ROI? It all depends on the world you think you live in. One that suspends reality where you ignore the facts and shove fists full of dollars at preorder nightmares or a grounded world where the data speaks for itself. Do you believe in math or faith.
Not going to ROI if my calculation is right... Have electricity to pay