They probably don't even care because;
1. The service was delisted on Bestchange in 2016. So the status is "disabled". A user can not visit the phishing site through the link on Bestchange which is now in active
2. Bestchange and Exch are sworn enemies for obvious reasons

I know about the bad relationship between BC and eXch, but this is a completely different field. Only inexperienced users will suffer the damage.
Even though exch is disabled on BC, this is what a search for the term exch looks like in some cases. That's enough for a scam.

I see no reason for BC to keep this knowingly with them, because it could be considered as promotion of a scam and then it could be considered as offering incorrect information.