You need activity every 12(?) months in your IHG points account, or all your points will evaporate. Activity can be either the addition or subtraction of points.
My solution would be to simply hand-write information on a 3×5 card and mail it in, as per the Priceless Surprises promotion. Each entry gets you 500 points, for which you would “spend” about 4 minutes and 51 cents (a 49-cent postage stamp + a card + an envelope).
It turns out that there are numerous other solutions, including purchasing a particular ebook for just 3 IHG points. See the list at https://www.reddit.com/r/churning/comments/43s0mv/i_have_10k_ihg_points_that_expire_in_90_day_what/