Increasing advances in Google's algorithm, footprint detection, and backlink quality assessment have changed the game entirely.
With each advancement, there is one less "secret" or edge to exploit. The big secret is that there are no more secrets.
I can see a high quality, well maintained, regularly updated PBN working well. But it will come at a considerable cost and require constant maintenance. You also have to guard against link rot. Good links don't always age like fine wine. Some skunk like beer if the site fails to remain popular, relevant or updated.
I remember years ago experimenting with link buys for non-gambling sites using text-link-ads.com (MatomySEO) and backlinks.com. The sites selling links looked solid. 2-3 years later, once promising bloggers quit, got day jobs or got bored. The links no longer carried the weight they once did. Even worse, these particular link sellers went out of business. I know sports bloggers who made an easy $200-$300/month selling links on their blog, now not so much.
If PBNs aren't your thing, it's starting to come down to quality content, outreach, low-risk link buys and networking with major sites higher up the chain.
Have a look at the heavy hitters in the USA sports market, like OddsShark. I'm confident they bought a few links early on. Lately, though, they're a traditional corporate
SEO operation: article and content marketing to big sports websites, major media mentions etc. Their odds pages are easy to link in blogs and forums, so perfect natural organic link bait.
Finally, on-page
SEO is more important than ever. If your site isn't responsive and doesn't load fast on mobile, kiss your rankings goodbye. It's not 2010 anymore. Most searches are taking place on mobile devices. This is obvious, but you'd be surprised to see many older gambling portals still trying to hack it with out-of-date design, over-sized banners and sites that take 15 seconds to load.
Appreciate you starting this discussion Juicer and not trying to pile on. From my perspective (16 years pro
SEO), PBNs will work for a little while longer. Meantime, diversify your link acquisition and content marketing. The minute Google identifies your footprint, your traffic (or clients' traffic) evaporates almost overnight.
IMHO, successful gambling
SEO nowadays is hard work, spending money and keeping your tactics white and a "Touch of Grey" (For the dead heads)
