I'm retired and also on a very strict control of expenses. I guess it depends on how much you play and how much it means to you to be able to play free of ads. It's getting close to Christmas and that's a great time to tell family members what you might want.
Only YOU can decide if this is relevant to you, and if it's something you'd appreciate and notice almost every day.
My first ad-free year was a gift, and now I make sure that I have the funds to continue it as I found the ads a horrible distraction to solving the cryptograms, and I find my joy and relaxation in solving them.
Hope this might help!