...Does anyone use this info for trading purposes and is there any data/studies to back up the "manipulation" claim?
I have seen no detailed studies but instead have recollections of how frequently options tend to expire at popular strike prices. Often there is a surge in trading volume of a stock during the minutes prior to an options expiration that pushes the share price to a key strike level. I was first alerted to this pattern over twenty years ago when I was daily interviewing market makers and floor traders at the CBOE for my TV financial news program.
Regarding the situation this week for TSLA and its options, note that the 247.50 and 250.00 strikes exhibit nearly identical pain levels.