Except they don't really 'rip' off the design. Gustard does seem to do things based on other units, but they do approach it in their own way. That clone you posted is a blatant rip off of a V281, something I would never consider buying. A Gustard H10 doesn't look like the V200 it is said to be inspired by: physically it's VERY different looking (would never be confused with a V200), it is only a Class A amp (no DAC), has 2 independant power supplies, and by all accounts (including owners of the V200) is the better sounding amp.
I have issue with blatant Chinese rip offs, but I have no issue with companies that may draw inspiration from other products but produce their own unique product. Gustard is the latter.
I see no blatant copy or rip off...unless being a box with a knob is a rip off: