Do you know when the maintenance started? Normally, whenever I come to use b1exch, it shows that maintenance is in progress. Overall, it was a good decision to display this notice on the website because anyone who comes to use the platform will understand that maintenance is ongoing. Is there any way to know when it started and when the update will be completed?

I prefer the disconnect between the main purpose and Anti Money Laundering checker.  The checking tool is one Privacy users should not even need any way because if you want Privacy you do not want to use centralized exchanges that check your history.  Having the tool on the homepage kind of defeats its main purpose, a no Know Your Customer instant exchange that clearly puts Privacy first.

It's important to check AML score of Bitcoin these days, but when it comes to paying domain registrar or server costs then I think it's better to use stable coins as you won't have any issue with stable coins. I personally pay for domain names using stable coins like USDT and USDC and I've never faced any issues. Although, one can use Bitcoin to pay for those but again I think it's better to use stable coins sometimes.

Ok, maintenance is over and b1exch is operational again.
Although I cannot determine which update was made, I noticed the addition of the AlwaysWhite notification
Now I'm more curious about the mechanism behind it all. Does this mean that b1exch does an AML check before sending coins to the user? Also, in order to guarantee such a claim, surely they must have a method to lower the AML score if risky coins in b1exch pools appear.

The stable coins that I use are often low in AML because they come directly from centralized exchanges. I don't really deal with anyone or any type of P2P of stable coins aside than centralized exchanges own P2P service. But, again it's true that stable coins can also get someone in problems if they come from non-genuine services or are part of any type of scams or hacks.

I believe AML checker words for both Bitcoin and rest of the coins and we should be thankful to b1exch for providing use a tool that's for free and that competes with the paid tools. I believe when it comes to Bitcoin and some alt coins then it's important to check the AML score of those coins for ones own safety. So far I'm impressed by the services of b1exch and we should be thankful to b1exch team for giving us a tool like AML score checker for free.

No one imagined something like that but we all know that b1exch cares deeply about its users that's why it made such a useful feature free for users of the platform. I've tested the AML checker and it works pretty well, however I haven't compared it to other paid checkers but I'm pretty sure it will compete with the top paid tools that charge premium for AML checking.

Looks like you are not the only one who was affected. When I look at the pools, the 24-hour volumes for both USDC (ERC20) and USDT (ERC20) are zero, yet the reserves are there. Which suggests that the swap directions have been off for more than the 24 hours – https://b1exch.to/Liquidity
It also seems the team forgot to mark an update on the website regarding this

Yes, used to check AML score of coins at Blockchair when b1exch didn't had an AML checker, but now we have another great AML checking tool that's free and one can use it as many times as one needs without paying anything. Blockchair is good for basic level AML checking but the AML score checking tool that b1exch offers is at another level. I think it's currently the best free AML checking tool available in the market and it's very good that it can compete well with the paid AML score checking tools.

Can we report a scam or suspiciously active address using B1exch AmlChecker tool?

You can, but the tool is simply to give risk score of the wallet address from its transactions. If the address receives from bad sources you cant do much about it. And also, i don't know if there are place or active database or list where to report wallet address used by scammers.