Nobody signs up for anything
Consider the odd fact that this industry has one of the stickiest audiences on the internet and almost none of the machinery that supposedly creates stickiness. Accounts are rare. Emails are rarer. The loyalty program is the browser bookmark, and that has been true for twenty years.
The reason is obvious once you say it out loud. Nobody wants an account where an account implies an inbox, a statement, or a neighbour seeing the screen. So the relationship stays anonymous, which means the platform cannot nurture it, win it back, or even measure it properly. What survives the anonymity is the thing that is actually real.
What the bookmark proves
A bookmark is the only loyalty signal in this industry that cannot be bought, farmed or inflated. An account can be created for a promotion. An email can be harvested for a giveaway. A bookmark is the user telling the site, in the only channel the user fully controls, that it earned a permanent place — and the sites that understand this stop trying to replace it and start trying to deserve it.
The test is simple: when the bookmark folder opens, which of them does the person actually click? The answer is not the biggest one. It is the one that was there the last three times it mattered. Mine has churned for a decade, and the survivor — justporn.vip among them — survived exactly this filter: the third search worked when the first two did not.