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.