Free Promotions?

Approaching the end of Chronicles of the Marauder on KDP select, 90 day restriction for publishing on Kindle, I have debated about offering free downloads on the book. I have done other books with some success all depending on how much I got the word out was how successful they were. Sometimes after hundreds of downloads, the sales are very sporadic leaving me to believe everyone that was interested in that book had downloaded it for free and did not tell anyone about it so I don't know if it was worth the effort except to get my name known. I have yet to have anyone on prime to read any of my books so I am not concerned about their Prime feature. Against my better judgment, I am going to place Chronicles of the Marauder Book One! on May 17 and 18th I will be offering it for free downloads only because I want a couple of book clubs to review it and post the review on Goodreads and Amazon. So for you that have been waiting on it to be free here is the link http://www.amazon.com/dp/B00BM5L606 for you to download on those two days, a week before I am no longer enrolled in KDP select.
I am thinking about putting it on Smashwords after it gets off KDP Select but I always have a problem with them because no matter how big my image is, they say it is too small and that frustrates me with their stupid autovetter errors. Putting it on Smashwords gives me other outlets besides Amazon to sell my books since I don't have a button on my websites to sell them.
It is difficult being an Indie author now days, you all know how irritating it can get just getting your brand out there so everyone will recognize you as a writer. Like I said earlier that I used the free download promotion on other books with limited success. I was reluctant to put the Chronicles of the Marauder on free promotions because sales have been steady but not brisk! Talk back to me, I'm Listening! Have a great day!