Well I knew someone who worked as sales manager in a 5* and she actually got some gifts from guests - and quite decent ones - a Tiffany pen for
example - here and there - and mostly bec they thought it was her who gave them the upgrade or similar (while this was not the case).

She told me the GM also received gifts from guests but rather from biz
clients who held conventions at the hotel or similar. Those were gifts
even beyond Hermes ties ..

I for myself, however, do tip only at estabilishments where I visit often
or in case of really exemplary service. The hotels are expensive
enough in the rates IMO - i never understood why to tip housekeeping
for ex ?? I do tip them but again for exemplary services - last time in
a hotel the maid brought me a whole range of Zegna bath products instead
the standard ones - which was appreciated of crs by a tip however I do not see a reason to tip for daily standard service.