The number one reason investors buy stocks or stock options is to make money now or in the future.

Fractional shares will not bring you close to accomplishing your goal of making money in the markets.

By definition a fraction is less that 1, so fractional shares means that you own 1/1000th, 1/100th, 1/10th, 1/8th, 1/4, or 1/2 of one share of stock.  

You'll never make any real money.

Here's the math - 

A $5 fractional share of AMZN @ $5/2616 = a 1/530 stake. 

At .0019 cent per point even If a AMZN goes to $20,000 you'll be 99 before you make $100.