Looking around in forums and Aliexpress, it seems that there are few close enough copies of Scott and Specialized older frames, but I haven't seen any copies of Trek designs.

I am just curious if there are some that I haven't found yet? If it is like it seems to be, then could be the reason fact that Trek is more agile to sue copycats (it seems to be true if I look Bontrager fake parts that some stores in Aliexpress are selling, after a week or two, mostly the parts are unavailable for some reason)?