There are different versions for interior and exterior use, using different types of glue. At least OSB/0 and OSB/1 can be used for internal applications and are considered safe. Not that I would trust a landlord doing this to select the correct board type, especially since the safe variants might have some issues with the humidity exposure in a kitchen.
But there still are many cases for using OSB indoors, e.g. behind drywall to give it some more strength (instead of more expensive plywood). Wouldn't want to leave it exposed in a kitchen though, it'll get messy if it's not properly treated, and in the picture it doesn't seem to be.
Guy should slow it down with the withdrawals from Homie Equity Line Of Credit, Tesla is getting stampeded by the more established manufacturers left and right and I don't really see what he should be compensated for, apart from apparently trying to use the company as his personal piggy bank.
In the last few years they've lost the budget EV market to Chinese manufacturers despite BYD cars burning down like candles in a forest fire, conservative German manufacturers like Daimler have caught up in regards to autonomous driving and are making further progress, products are stuck in development hell etc. etc.
It's a really valid point to raise – what exactly has he done lately to deserve the payout? The situation in 2018 was a bit different, but the amount would've been well on the outrageous side even back when the stock was rocketing and the recent controversies weren't all yet a thing.