I assume the effectiveness will be very limited.
First of all, exploiting port scanning tools will rarely be useful because most pentesters will use VMs and other confined environments when conducting any attacks.
Second, it is very unclear how useful it is to obfuscate which ports are really open. If you still have services running these obviously have to respond properly. There are only 65536 ports so trying them all is not a big deal. In any case, you will usually have to announce on which ports services run because you want people to find them! Why else are you running them?
And third, answering all queries on all ports might actually generate quite a bit of useless work. You might want to spend those clockcycles elsewhere.
So, these are the first reasons that come to my mind. I have not used this tool but maybe other people think similarly and that is why it has not seen widespread adoption.