I get it. The verb read can be pronounced reed (for the present tense) or red (the past tense). Both the present and past tense are spelled the same way, but pronounced differently. So maybe that’s the thinking behind this goof on Yahoo! Shine:
Maybe the writer was thinking that plead is like read. Here’s a shocker for her: The past tense of plead is not plead. Plead is pronounced pleed, never pled. The past tense of plead is pleaded (or pled).