Do not be surprised if you do not see the site accessible on May 1. You can see their announcement here on this forum on their thread: eXch - instant exchange BTC / LN / XMR / LTC / ETH / ERC20

Know that Lazarus group has been a threat to everyone even to sites that have signature campaign on this forum. Remember they were responsible for for Sinbad shutdown and not responsible for the shutdown of eXch. eXch was reported to have been used by Lazarus group in laundering $35 million worth of coins from the $1.4 billion Bybit hack. eXch said only little amount worth of coins is linked to Lazarus group.