[Avamander]

> It's cheaper and easier to munch through lots of throwaway domains than to keep moving IP neighbourhoods, isn't it?

Depends on your approach. If you hack IoT devices then you have a lot of IP's. If you hack Joomla sites, you have a bunch of domains.

> I don't know - is free domain tasting still a thing?

Yes. There are also discounts and stuff like that.