How many people can you send to nearby people in a group message with one click? Is there a word limit for greetings?

Generally, you can send to 500 people, and there is a limit on the number of words. However, I, a marketing person, borrowed Reedzw’s one-click text message to send a group message to 2,000 people. And I have not counted the number of words, but there is no limit. I, it’s almost Chinese Valentine’s Day, I’m ready to send out mass message marketing