The legitimate earning methods have not changed much: cashback on shopping you would do anyway, paid surveys, offer completions, and rewarded games. What changes is the payout quality — how fast, how low the threshold, and how many redemption options.
Red flags to avoid: thresholds you can never realistically reach, "pending" rewards that never confirm, and a single redemption option with a huge minimum. These are how apps keep your earnings.
QuestX combines cashback, surveys, offers, deals, and games in one place, with low thresholds and instant payouts to PayPal, gift cards, or a connected account — so the value you earn is value you can actually use.