They didn’t increase just over the Weekend. I have been planning my positions for around 2 months now(on the red for a while) exactly for this(recovery) and price was always the same until now. I know they have it on their T&Cs that interest can change at any time but at least an announcement would be good since 4x is already quite a big increase imo
I have also kept a record of the long term positions swaps values incase they changed, and after this whole time they only changed this Weekend, when market is green.
Update: looks like its automatically calculated (increases - decreases) based on market conditions.