What're the differences in the Chess.com memberships?

Chess.com has to make money somehow. Their biggest income is memberships. They currently offer three, with either a monthly, or a yearly payment. All Premium Plans Include: Endgames, Daily Puzzle Explanations, Video Library, Opening Explorer, Custom Flair, Drills, Club Management, and Time-out Protection for Daily Games. The cheapest of the 3 is Gold.  It offers unlimited puzzles, unlimited lessons, and unlocks all of the bots in Vs. Computer. It also contains no ads. A monthly payment for Gold is 6.99 and yearly is 4.17 monthly. (Yearly means a bigger payment up front, but a 4 month discount.) The 2nd option is Platinum. Platinum unlocks unlimited game reviews and includes all of Gold's benefits. At monthly, it is 10.99 and yearly it is 6.67. The most popular plan (I actually use it) is Diamond. This plan includes unlimited coach explanations, unlimited insights, and includes all of Platinum's benefits. Monthly, Diamond is 16.99 and yearly it is 10.00. I definitely think buying a premium membership is worth it.  Oh, and not to forget the best part, you get a shiny Award for your support to Chess.com!