I would like to have an explanation on the use of the structure Be used to. I've always thought that It refers to habitual actions in the present. But a native speaker marked this sentence of mine as a mistake, "It is a pillow developed for sleeping on a plane for those who are used to travelling frequently" and put instead, "..for those who are use to travelling..."
I've never seen this structure Be use to (without the d at the end of "use") before and it does not sound correct to me at all. But I surprisingly found it used very frequently on the internet. So I just don't understand.