I like https://tags.pub. it always boosts my hashtagged posts, so I can feel like I said something that people care about!

#TagsPub #MoreTags #MoreBoosts #ItMakesUpAccountsForAnyTag #TheyJustAppearAndBoost #ThankGoodnessThereIsntATumblrTaggingCultureHere #WithMessagesAndCommentaryInTags #SoManyAccounts