Bittrex happens to be my "go to" because we live in the state of Washington... and Bittrex happens to be domiciled in Seattle, WA.
A chunk of the significance of your info request is likely related to that... Washington has hysterically tight regulations on crypto trading, not because of anything to do with a dislike of cryptos, but due to our legalized cannabis trade... it was the first state in the US to do so, so no precedents existed.
These rules were created by the reality that when cannabis was legalized, growers/dealers soon discovered that they could bypass taxes and tariffs by trading in cryptos (this goes back almost 8 years now) instead. For a while, most exchanges wouldn't even let you open an account if you had a Washington address. It's a little better now, but only the exchanges willing to submit to the states draconian regulations trade here. At the moment, that means Bittrex, Coinbase and a couple of others.
Bittrex, being based in the state, asks ALL users these questions now, regardless of where you live.
=^..^=
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