[kandalf]

Perhaps another way of thinking about it is in terms of being a market maker versus a speculator. I think of Opendoor as more like the former, where traditionally a flipper refers to the latter.

[amalag]

Market makers make money on the spread and facilitate liquidity. Speculators hold an asset (sometimes short term) for a rising price.

Flippers traditionally do benefit from a rising market because of longer hold times.