<sarcasm> Common typo. In American English the plural of Lego is commonly written as Legos. When in fact the plural of Lego is Lego. </sarcasm>

Not a typo. 706 matches for 'giving away your legos' and 2620 matches for 'give away your legos' on Google

News as pedestrian as the PR writing style.

I don't think it's a very common expression, but I think I might have heard it before.

Disrupting language.