.......and therefore I’m surprised that freebitco is offering such high odds on his victory. .........
Freebitco is using parimutuel betting system. So, odds are not offered by freebitco. They are determined by users. Odds for Trump are now smaller because more money has been put on Trump.
Till now 62,000 people have bet on Trump, while only 33,000 people have bet on Biden. Unlike many polls, people here in freebitco believe that Trump will win the presidential election.