FII Day Trader?

I recently came across CROSSLAND TRADING CO. They make a lot of intraday bulk deals! Can anyone explain what’s going on here?
https://trendlyne.com/portfolio/bulk-block-deals/custom/?query=CROSSLAND%20TRADING%20CO

Why are you calling them as FII

Lot of such fundoos in the market one another is Shaastra Brokers

because, as per what I found, their office is in US! https://www.bloomberg.com/research/stocks/private/snapshot.asp?privcapid=262556666

I was also wondering, would any of these trades really be profitable as they usually square off positions in 1 Rs movement! Is it sufficient to pay STT and other taxes?

SHAASTRA SECURITIES is interesting too!!

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