You can’t beat free. Starbucks’ limited promotion of its macchiatos ends Monday. It’s a buy one, get one free deal — the free one being of equal or lesser value, natch. Just run by a participating Starbucks between 2 p.m. and 5 p.m. The promotion started Thursday. Read more about Starbucks’ deal as well as IHOP’s free pancake giveaway, which starts tomorrow.