The housing market in Toronto is a hot mess at the moment. When I told my friends in US that even for renting a condo, I had to put an offer that was more than the asked monthly rent they were surprised and wouldn't believe me!
The excessive imbalance in demand Vs supply also means that the owners have > 10 offers for each house and the prospective buyers/renters are just putting blind offers in the hope that their offer is more than most of the other offers.