To be fair, it is marketing in that it's a click generator to remind/induce you to engage with the site.
In theory you can configure it by checking boxes, but in my experience disabling push notifications only means that the site constantly pesters me to enable them. I constantly see this message, and not surprisingly, choosing "never ask again" always results in being asked again in a few days.
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I've not seen that happening on any of the devices/browsers I use (I use several and it's only enabled one of them). It could be a setting in your browser preferences clearing it out.