My brother bought a house recently, they placed a strong offer on an OpenDoor home and they heard back the next day saying they had a higher offer by almost 20%. So, they said no worries - we'll go with a different home then.
OpenDoor allegedly came back immediately with "wait wait wait! the other offer actually fell through, so you got the home!"
FWIW, as much hate as realtors get for their high fees, in theory shenanigans like this are harder to pull off when using them because usually the selling and buying agents share a network and are incentivized to deal with each other somewhat honestly.
Also, because each agent only get a 2.5-3% of the sale, they are not as sensitive to the final selling price as the owner. For example if the house in question was originally offered at $1M, 20% over asking would be $200k. The selling agent would only pocket $5-6k more. Nice to have, but not necessarily enough to risk their reputation.
On the other hand, because OpenDoor is the owner of the property. Negotiating a 20% increase means they pocket the full 20%. So they have a strong incentive to be dishonest here. At the very least, I would expect them to push the law to its limits when trying to negotiate the selling price upwards.
OpenDoor allegedly came back immediately with "wait wait wait! the other offer actually fell through, so you got the home!"
Pretty sketchy stuff.