Glad this discussion came up.
I had a £11.99p.m. subscription for the Pro14, I didn't know about the above offers when I took it out!
I thought I cancelled the subscription back in March but it turns out it was only suspended and is just about to restart - so this discussion was perfect timing, as due to redundancy I can't justify the additional expense and need to cancel. I just need to decide whether to make one payment of £11.99, which should cover our European adventure this year!
For those in a different position, if you subscribe and then cancel, they generally offer a discounted rate for a further 3 months.