Step up to the hundred-gig level for one month (≈ $two bucks). Downgrade again once the URL expires—leftover gigs returns to your card within 24 h. Divide 25 GB bundles into two 12.5 GB parcels and daisy-chain the links in the note: "Part A dies Tue 14:00, Section 2 dies Wednesday 14:00 UTC." Collaborators won’t be able to re-share after expired.
Fire the address via iMessage, never email—inbox conversations often hide expired links and baffle team. Include the exact deadline in UTC−0 to dodge timezone drift.
End with a micro-call that matches the next section. If the sub-head explains price, close the header with cost context: "for less than a coffee a day." If the next block shows testimonials, finish with social proof cue: "trusted by 4,200+ baristas." Alignment this tight keeps bounce rate under 20 % on average (Unbounce conversion dataset, 2022).
Initial run lasts 38 min on 100 Mbps