[cuylerstuwe]

Are you looking very specifically for “ONLY 7 figures”?

Revenue, or profit?

Not hard to think of a handful of big players in revenue; 1Password and Honey spring instantly to mind as 9-figure revenue players.

[ekabod]

I am interesting to know if a solo developer can make a living, 6/7 figures, producing and monetizing extensions.

[lapcat]

6 figures yes. 7 figures no.