I am highly suspicious of some of the listings on ...

I am highly suspicious of some of the listings on 99.co. I saw 2 properties that I was interested in that were just recently posted and when I inquired about them, the agents told me that the properties were "on hold" or already taken. How is this possible during a pandemic when people are not allowed to visit the properties in person? After I asked about these properties and was given an excuse, the agent then proceeded to send me other listings that have been on the market for a while. Why list properties that are not available? Is this some kind of "fishing" scam? Is this the old "bait and switch"? So far, I am very unhappy with this site and find it not very honest.