Hey Snkrsresell.
Honestly, for looking into the funnels best way is really going into them. Try to find them by google searches, and go ahead looking at what they're doing. I don't think any tool would be able to do so.
For the Cookies, it's a strategy I've used on the past, when trying out Nutra Products.
Here is a youtube video for you to understand what it is in specific
Basically, you open the casino you're advertising, and take a screenshot.
Blur the background and put a cookie notice.
The best example I can give you for that, I've done affiliation with Stake many times, and they have cloudflare on their website.
When doing an A/B test I noticed that the amount of people who reaches the Stake website is higher when we have the Cookie Pop-Up.
Let's say someone clicks on a Ad on Google, it's weird to see at a first glance Cloudflare Blocking you, but when you do the Cookie Pop-Up, Cloudflare only appears after the person "accepts" the cookies.
The user view on that is like the website is checking the Cookies. This increased a lot of traffic reaching the website.
And +, it's not so usual, but redirects might trigger unlinks and not reach the casino page.
I think I talked about keywords here before, but best approach is talk with someone native in the country you're looking to advertise.
Like you said, in Indonesia, "slotus gacor" or "situs online" are perfect keywords.
When advertising to something specific like Stake, if the brand allows to do so, I would use Stake keyword.
There are really tons of ways, I specialized the most on Cookie Pop-Ups only. But there's some strategy people are doing in countries like Japan, using sites.google for example.