cross-posted from: https://lemmy.world/post/50434194
Proton VPN’s pricing page exposed an ab-test identifier linked to two VPN Plus prices: €2.99/month (70% off) and €3.49/month (65% off). Repeated testing produced B → A → B → A → B, with the variant matching the rendered price each time. €12 difference over 24 months.
Happens all the time with GitHub Actions when they update runner images. According to Microsoft, it’s “fundamentally unfixable”.