The whole auction/raffle is a major problem of asmachta lo kanya. It also encourages gambling and m’sachek b’kuvya.
This hanhoga nefed hatorah is the gateway to casino visits and gambling addiction.
You never see pictures of Gdolim buying a raffle ticket!
(Only badly photo-shopped pictures of them giving to “certain” kupos of aniyay tzedaka – it is davka badly photo-shopped to avoid ram’ous, trickery)).