while I think price increases are understandable, it does seem to me like giving a warning to your customers ahead of time would be the appropriate thing to do
I know people will say “its only $6” thats still a 20% price hike.
This is also feels like the very Proton thing of forcing people into a bundle (SL+Pass) for a higher price instead of allowing people to purchase the service they are actually there for.
EDIT: only affects new customers