Has anyone tried to use Octoswap recently?
Nope.
It looks like they are reporting fake exchange rate to attract more customers, and they are not the first service doing that, but it is strange to see they have OrangeFren guarantee.
I tried testing exchange from USDT to BTC on OrangeFren and Octoswap was on the top of results I received.
Maybe this is the reason they can have different exchange rate, up to 3%:

I doubt that the coins are tainted because I never got to the point where I had to fill in input address.
The problem is that they give some imaginary rate of 3046722 BTC for 27 USDT. When I try to proceed just get error:

Tried the same input again and this time the first result is CCE.cash that also gives completely different exchange rate:

