Following this post : https://community.revolut.com/t/generation-of-e-card-virtual-card/716/18
The idea is this : some banks offer the possibility of creating on-demand a temporary e-card number for safer online purchases.
You specify a maximum amount and a length of use (for example €80 & 3 months) and during that period you can use that number up to that amount.
If the number was to be hacked, you wouldn’t risk losing more than that amount and only within that timeframe.
Would you like Revolut to implement such a feature ?
Let’s see if we can generate enough interest to motivate Revolut…