We don't really know the extent of the magic ; even the low-key divination power would be enough to make a killing (especially as long as people out there don't know about it). If you can beat the odds, even slightly, you can incrementally build a fortune on sport bets. You don't even need magic to be able to see the future, just the existing situation, to get an advantage in black jack (what is the card on top of the deck isn't divination on the same nature as "who will win the next superbowl"?) And it's pretty rules-of-physics compliant to have insight on a past event. But if you don't like that, that's fine, that's your setting. Wises would be quickly banned from casinos once magic is acknowledged, though, so this line of work will only last as long as people not only don't know about it but can't prove one is a magic user/creature.
I am not that sure... 1 or 2% is 100 to 200 millions people. Flat Earther are widely known on the Internet and they are much less to be convinced of this naughty word. A few users would use their powers to convince people of joining their cult and demonstrate the rightness of their cult by performing magic. The Internet (at first) and the national TV (after a while) would allow them to gain instant worldwide notoriety (as experts try to find the trick and must admit they can't). And you only need to have ONE televangelist in the world to out it very quickly.
At the same time, 1% or 2% of your legislative body has magic power. If they can get mind-altering magic (I know, not D&D magic but I am simply POSTULATING here) or any kind of magic that can be used to destabilize an opponent in a debate (like creating just enough pain to make him lose his concentration... try debating with someone when you feel the burn of cigarettes regularly on your body... and you said that people could create fire... that's a very small fire!) they'd soon be at the top even if they started as low-ranking politicians ; even if they are the only one really convinced of magic, they would cast a few spell at a secret party meeting and even if the world at large doesn't think magic exists, you'd get this:
Withcraft Act 1542.
Yet, most people would deride the new President's administration for passing such a law... but it wouldn't stop the Wise President to make it happen (just to be sure his power isn't threatened by other, unsanctionned magic users).
If you don't suppose even distribution, you can even get areas where the prevalence of magic users reach 10 or 15% the population (redhead are 1% or 2% of the world population but much more in Ireland) and these country would be the first to act. You can't hide it without a strictly enforced Statute of Secrecy among the magic users themselves, so as soon as the Rangers "ease" the knowledge.... The secret would be known very quickly, especially if there are some flashy (but not necessarily powerful) use of magic.
Plus, you don't need especially powerful effects to have tremendous consequences. If you can move an object just by looking at it, do the same think with an artery or brain and you'll probably kill people without expanding a lot of energy, it must be a very simple effect as the body can be very frail in the real world. If the population of serial killers and magic user intersect, you'd have a very high-profile case of use of magic that would be on the news instantly. But as long as they are no ability to prove the use of magic, the killer will be golden with a very low-power effect.