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I do my thank yous on one of their posts on steemit. I usually go back to a post that is about 5 days old. Of course I need to have something to say about the post I'm commenting on too.

This is the most effective for me - sometimes I get my comment upvoted and usually a good connection out of it.

Thanks for the tip.

You're welcome. I hope it works for you too :)

In their comments, on steemit.chat, or discord. Usually, we have the same name on the external chat programs. Or I ask people in their comments if they use chat.