don't pay for something that's going to be useless to you soon.

[GAMEchief]

I am all for commas, however, the citation states he and I are not always grammatically correct.

what

Obviously it's not always I. Or else "me" wouldn't be a word.

It's based on the circumstance of whether the people are the subject or affected by the subject. In the original quote the picture is the subject and the people are the affected. So yes, me is correct and I is incorrect. However, in your new example "he and I" are the subject

.In TU's quote, I is the correct usage. No citation has been provided to say the contrary.