EXCC were transparent from the very beginning and told the public about all the changes on their part. Recall the high-rated ICOs of 2017 homeblockcoin, unixcoin, hextracoin, regalcoin, and others. It was all scam. On the contrary, EXCC team made several products during this time. Only greater public attention is needed.
650btc is not such a big amount given the current exchange rate. In addition, the tax rate in Poland is 19%, which is 123.5btc from 650btc.
I think EXCC-XULT-DEX project is the good one, the dev team working hard in the background to deliver what it was promised.