In small measure

Ann225

Then I don’t understand why a native speaker on this forum told me a while ago that it was correct.

That is the problem with the Internet, isn't it? They say no one knows you're a dog in here. I am quite bright, a 60-something lifelong speaker of American English, a copyeditor, well-read and sincere. I'm funny, too. But I could be making all that up. I could also be wrong. You will have to ask around in other forums, I guess, to verify what you see here.

"In small measure" for "scantily" is not an idiomatic expression, so it sounds like a pointless, misleading play on words because of its parallel with the real idiomatic expression "in great measure", which does not mean "abundantly". You should say what you are trying to say with "in small measure" in some different way for that reason.