It's not exactly a discount — they calculate the remaining period on the existing plan and deduct it.
The tibo reset was getting too tight, so I moved up from pro-lite to pro.
I feel like I took the bait on the intermittent reset policy..but there's nothing to be done.
I couldn't even go on vacation and I'm just spending the vacation money.
Anyway, using xHigh to my heart's content feels great.