Why the most people do not track properly BH Ads?

I've checked out quite a few ads, especially in the crypto space... like signal offers and stuff.
I noticed that almost none of them actually track anything... maybe just pageview or lead(join).... They just use a cloaker/whitepage, and that’s it.
Am I overcomplicating things?

Server-side tracking would keep the ads alive much longer and improve ROAS...

Some of them redirect directly to Telegram with UTM parameters... are they just excluding audiences who already joined?

Some BH ads just make money so they don't need to track. They just get the lander up and make money

how do you know they are not tracking?