I've been using NextDNS on my laptop, two phones, and a tablet for months now, after hearing about it from a poster here on HN. Love it. I'm just worried that

I've been using NextDNS on my laptop, two phones, and a tablet for months now, after hearing about it from a poster here on HN. Love it. I'm just worried that there is something a bit more nefarious going on. If you're not paying, you're the product being sold. Are we still just in the 'growth and acquire' phase here, where paid subscriptions will eventually be required?