It makes no difference to me if you're donating for CIs and not being active otherwise. I don't see the point in it personally, as I wouldd rather not waste $5 a month on a site I am not actively participating in, but that's your prerogative. This type of hoarding is actually beneficial, in my opinion. Your money helps to improve the site for those who are active, and if some day you decide to sell your old, rare contribution and event items, you will make people who have been searching for them very happy. :}