I often use a Nikon 1 V2 with a 1 "sensor for commercial work … mostly product-type photographs.The quality of the image depends much more on other factors … and its sufficiency really depends on the requirements.
I do not sell to stock exchanges, but Adobe Stock has a minimum requirement of 4MP for photos and 1920×1080 for video; which is more than enough for most web-based needs (the other agencies are similar). And as my Nikon1 can meet / exceed these requirements, the results of 1 "sensors should be acceptable.
But real needs are not always known … the agency does not know end-uses when it accepts subsections. And often, the customer does not know what he really needs and wants as much as he can get (as little as possible). It is not uncommon for a client / client to insist that they need much more than what they actually do, and trying to fix this is usually futile.
The purpose of all that is to say; yes, 1 "sensors can be perfectly acceptable, but you will have a wider market if you use something that produces higher specification files.I also use a D850 …