By Dan Weil Companies split their shares when the price gets so high as to make it difficult for non-wealthy investors to buy them. Stock splits are all the rage this year. First, Alphabet (GOOGL) – Get Alphabet Inc. Class A Report announced a 20-for-1 split in February. Then Amazon (AMZN) – Get Amazon.com, Inc. Report announced a 20-for-one split in March. Tesla (TSLA) – Get Tesla Inc Report also revealed plans in March to split its stock for the second time in two years. And finally GameStop (GME) – Get GameStop Corp. Class A Report said it has plans for a 3 1/3 to one split. Companies split…