Nollitik, I went through the same process you are going through when I first got my HEX.
There are several services out there, but most cost some $, as they take time, effort, programming and continual maintenance let alone the cost of renting servers etc…
If you do use Dave’s Service consider donating to help his work!
In terms of service, for example there is one that I am trying out at the moment is called Axiom Shield (not cheap) but very good.
They specialize in mikrotik products for good reason (excellent products for this type of defense activity).
Also, they give discounts to active service members and veterans!!
https://axiomcyber.com/shield/
A much more affordable and excellent option, that I have also used in the past, that I can say is stable and geared towards Mikrotik products (small or powerful)
is the MOAB by mozerd, a fellow mikrotik forum contributor.
http://forum.mikrotik.com/t/moab-mother-of-all-blacklists/122053/1