You mean the “what’s paying $10/20” question — usually those are surveys/offers that pay $10–$20 USD. On GAIN the best walls for that are Prime Surveys, Torox and BitLabs (also RevU, AdGate, Adscend). Check the Earn page and sort by payout. Reminder: 1,000 coins = $1. Tell me your country/app or web and I’ll point to likely offers.
