The top review sites make 7 figures still(the very top ones may make 7 figures a month). I had only $400 in commissions last month from 13 small casino review sites last month. The thing is, they barely rank for anything, just the rare click. So if I had 1000x traffic, which some sites do, then it's possible to make a fortune($400k a month, some of my sites only got like 2 clicks last month, but I still get occasional sign ups and deposits form them all combined), the crypto casinos make it easy to actually deposit and withdraw a lot of money, online gambling is at it's zenith. Shit if I got 1000 clicks a month from google(and I mean google clicks, there's so much bot traffic idk where it comes from), I'd be making like $20k a month how well it coverts. When I first started, I made $2k in one day off a rando who played once, like $5k deposit and a redeposit.
It's the best way to gamble, and the slot odds online are exponential better, 96% RTP usually(land based are often 86-93%, the legal min in vegas is only 75%. A lot of people don't understand the math. 96% is 4% from 100, 92% is 8% from 100. People see that and think "oh, a 4% difference", no, the difference between 4 and 8 is 100%, do the math. Averaged out, $0.96 per spin back v $0.92 per spin back, that twice the averaged loss per spin, online slots, averaged over loss and big wins, equal double the amount of spins on average at the same bet size. I really is twice the chance of winning on online slots. I've played a lot of both, and watch a lot of land based and online streamers, there's a massive difference, landbased gambling besides table games is a joke(yet people still do scratchers, which is 68% RTP, the math on those make vegas slot seem like a good investment lol, much less online). Anyway, a lot of gamblers realize this, and play huge online(best commissions I've heard from others is over $1m off one player, yes there are people who deposit $50k at a time, they're out there)
Problem is, there is about 10,000 other review sites out there, and even low vol terms(even some where like top sites maybe only getting a few clicks a day) are competitive with often top 5 results being sites with min of 25,000 backlinks(even for some of the smaller 150 page sites, the biggest sites have millions of backlinks).
Gambling affiliates make more than ever, but there's also more affiliates than ever.
Though the real new move is to be a streamer, top ones are making millions, and some of the middle audience range ones would be if they better monetized. I watch a handful of streamers, and some kill me because they refuse to do partnerships and know 0 about affiliate marketing. If all the streamers weren't fucking stupid they'd each have a casino review wordpress site with community forum, and instead of 1 invite code for 1 casino, they'd could have a code for 50 casinos, but theyre all married to one(and often ones tethered to specific geos with KYC, so they could only earn from 20% of their viewers). And they have communities, so would make sense if they had a forum. I tried streaming for about 10 streams. Just like $300 deposits. Was hard, got nearly no viewers at all, legit some streams(twitch, kick, and youtube) I'd get 0 views, maybe 1 or 2 for like 10 seconds, wasn't even a chance. Really have to have a big bankroll, and do giveaways. Though the big streamers with thousands of viewers can make killing. You really only need a few high rollers a month to make a lot. Some people really blow through $20k and shit, you can get up to like 40% as high as 50% on losses.
Anyway, I no longer focus on the niche. Too damn competitive to get any SEO traffic, but if you hypothetically could, yeah, there's more money to make than ever. But good luck ranking for shit. I hate building sites and then literally can't get any traffic(some of my sites are microsites I speed run, but I have 1 big site with tons of pages and still I only get 0-2 clicks per day from google, avg 1, and that's for my 3 word domain match, counting the NGLD ending, which does count as a search term word despite what SEO experts say, I ranked #1 for that low vol search quick). You could make like EMD 200 sites, and collectively do well. I actually considered that, would take a long ass time but it would be probably 6 figure income even with each one performing badly.
There's more achievable niches. It's like looking at stripper, theres infinite money in the niche, but you can't touch.