Developers are notoriously hard to advertise to: they block, they skip, they distrust. But there’s a moment they’re looking at the screen with nothing to do — the wait line, the idle spinner Claude Code shows while a task runs. waitline turns that moment into one tasteful sponsored line, and lets you put your product there.
A high-intent audience, in a calm moment
You’re not interrupting work — the work is what created the pause. Your ad appears in space the developer is already watching but not using, as a single clickable line. That’s reach into an audience most channels can’t touch, at a moment of real (not stolen) attention.
Prepaid, bid-priority delivery
Campaigns are prepaid: you buy blocks of impressions, and your bid sets delivery priority — higher bids serve faster, not at a different unit risk. There’s no wallet to babysit and no surprise overage; you fund a campaign and it delivers. Undelivered value converts to account credit if you close a campaign early, so nothing is stranded.
You pay for attention, not pixels
waitline bills an impression only after it earns real view time — measured per turn, not the instant it renders. Combined with per-viewer cooldowns and dedup, that means your budget buys genuine eyeballs, and your reach numbers mean what they say. Developers keep half of it, which is exactly why they leave the line on.
Every creative is reviewed
Trust runs both ways. Payment is always collected first, then your campaign either serves immediately or is flagged for human review — nothing reaches a developer’s terminal unreviewed, and creatives are sanitized so they can only render as one clean line. (More on that in how waitline moderates campaigns.)
If you’ve struggled to reach developers without being resented, the wait line is a new kind of inventory — attention that was previously dead air. Prepay a campaign, set your bid, and meet developers where they already are.