Honestly I've never been tempted to use Opera GX because of one simple formula.

If somebody is advertising, at all, then the minimum amount of money they intend to make from you one way or another is equal to the cost of the ad divided by the amount of people who see the ad… multiplied by somewhere between 5-100 to reflect the actual amount of people who will listen to the ad.

If a free product is being advertised, and its not a government mandated service or a registered nonprofit, you should be suspicious.

If a free browser is being advertised, you should be very suspicious.

If a free browser is being advertised a ridiculous fucking amount by every youtuber you should be screaming 'JESUS CHRIST WHAT ARE THEY PLANNING TO STEAL FROM ME'.

that is also the technique fextra uses on the fextralife wikis to boost his twitch viewership, and why he made it such a pain to filter his twitch embeds with adblockers.