DigitalOcean had a free-trial popup converting at a miserable 0.21%. They changed almost nothing about the offer. They changed the reason for it.
The new popup: "Wait! It's our birthday, but you get the present. 1 month free cloud hosting. Code: HBD2CW."
Opt-in rate jumped 10x.
Then they got greedy and tried it for other occasions, Independence Day, Halloween, Christmas. Every single one pulled 10–15x the original rate.
The lesson: the same offer feels completely different when there's a reason behind it. "Here's a discount" is noise. "Here's a discount because it's our anniversary" gives people permission to act now. A reason, even a flimsy one, beats no reason at all.
What's the story behind your current offer? Or is it just sitting there, naked, with no excuse for existing today?