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I love Apple Music, just my 2cents

That's more like 1 cent. Why do you love it? What do you love about it?

off-topic, but is there a difference between the how many cents you use in this idiom?

Only if you have zero sense.

The idiom is always "two cents". The parent was implying that because the GP didn't add much to the conversation that this subtracted a cent.

There is a little use of five cents here. Not lots, but it's not unknown for it to change amount.

...still no correlation, though.