hey guys, im making a few lead magnets now, but my product is a 50-60 pages ebook that may take some time to finish. my question is, should i start funneling costumers now and build a list? or should i wait for the product which may take 1-2 months? im sure its much more usefull to try and sell them when they join and not 1-2 months later, but i guess i can always get new costumers and will be left with a list i already built. any advice?