Man I see this debate pop up every other week and the advice is always so surface level. "DOI is better quality" okay but my payout is half. "CPL is volume" yeah but the leads vanish. Feels like everyone's just repeating what they heard last time. I'm trying to understand the actual mechanics, like what the advertiser backend is doing with each type, because that dictates everything. For a while I was running SOI sweeps hard, decent payouts, but the data tells a different story on retargeting. Those users don't stick. Started testing DOI on a higher payout offer last month, the volume tanked but the post-sale email sequence actually converts. Now I'm sitting here looking at spreadsheets wondering if the initial CPL was just subsidizing the real buyers later down the funnel, you know? And nobody talks about the scrub. The difference in lead validation between a simple email submit CPL and a full DOI with phone verify is a whole other world of margin. Maybe the trick isn't picking one, it's matching the traffic source intent to the offer's validation level. But that's a guess. I wish someone would just map it out without the fluff.