Ok, so the payday loans genre is well known as a haven for black hatters where they.
a. Buy an aged, trusted domain.
b. 301 it to a paydayloans domain name.
c. bomb the paydayloans name with links from forums, blogs, junk articles - even outright site hacking.
d. Make hay whilst the sun shines, make a quick 5-6 figures till the domain is penalised. then start again.
I don't understand why google allows this to work. It would be so easy to stop.
a. Treat all links as spam until proven otherwise. Make the links pass a quality test before being counted.
b. Check backlink profiles of a site, separate direct links, from 301 links to another domain. Penalise the aged domain, if the site its 301ing to gets a bad link penalty.
I am now seeing this dreadful technique spread to other niches with high value affiliate/drop shop business models.
Oh please please please Google, sort yourself out.