Imagine having 10 paying customers giving you $80 per month. You need to provide some level of support, deal with charge backs which can get you MATCH banned so payment processing becomes near enough impossible, update the product and market it too.
So, um, no.
One of my present products has over 10,000 users (b2c rather than b2b), we get a support email every couple of months.
Really depends on your product I guess, or you've never actually done it and are pulling figures out of your ass.
For example, we were one of the first to integrate with the Google Workspace Marketplace when it launched many years ago (called Google Apps Marketplace back then). It brought us a lot of leads in the early days. Today, discoverability has become a real problem. The "luck"-component in being featured in any search result or when browsing the marketplace is now so large that I'm not sure if for new products it would still outweigh the work of building the integration and keeping up to date with inevitable breaking API changes.
Overall it can be an amazing channel for growth though, so it's mostly about carefully picking one where customers might find you, rather than just going for something that looks promising because it's big. There's a big first-mover advantage when launching on a newish platform (and as the list proves, there's many new ones).
It has about $3.5k MRR, is still growing and I spend maybe 5-10 hours a month on it.
Also, I had no brand before that.
Also, how did you start marketing it/getting your first users?