Other than the Browning BLR, has anyone ever made a commercially-successful detachable-magazine lever-action rifle?

Yes, some of the more modern run of the Savage model 99 had detachable magazines. Mine does not, it has an integral rotary mag. making it more a streamlined profile. VERY accurate, NO scope. Almost a shame to mount a scope on such a rifle.
* if ever buying one, the most valuable of course are the proper "Savage" calibers, 4 of them in this model offered. The .300 Savage is very popular for the model 99, other calibers are rare and hard to find ammo for.

There were a few, I think others have mostly covered them.  The big reason you don't see a ton of these options is the market for lever guns doesn't have a lot of desire for them.  A huge component of the lever action market is cowboy action shooters, and has been since back in the 90's.  People competing in cowboy action shooting try to do as much as they can in a traditional manner, even with newer guns - so they want their guns to mostly look and function like cowboy lever action rifles.

Another huge component of the lever action market is the entry-level shooting and hunting crowd, seeking an affordable beginner deer rifle -  .30-30 is nearly perfect for this.  There's no need for higher capacity for most medium game applications, and the .30-30 as it is gives a feeling of tradition to a young hunger - pinched and scuffed thumbs from the heavy damn loading gates and all. 

The final nail in the coffin for the idea is ammo.  Box magazine design for rimmed cartridges can sometimes be tricky - it's doable though.  And the real advantage behind the box magazine in a lever gun would be the ability to use pointed bullet.  Hornady solved this with their LeveRevolution ammo.

Just because something is cool doesn't mean enough people want it to justify creating it.  Why would we need more options, the BLR looks cool and was chambered in a lot of different rounds, I just looked it up and I kind of want one.  Ruger now owns Marlin though, so it'll be interesting to see what new stuff appears in the next couple of years.

You don't frighten anyone with your insistence on letting criminals have access to all kinds of weapons.

I fairly certain that Winchester and maybe Marlin have made a few. Not certain how well they did commercially though.
I recently built my first AR able to handle both .223 and 5.56, but am fond of my MAC-10 with 32 round stick.
Both are reliable and capable in their own right, and are ready for the next Trumptard insurrection attempt.

In Australia where they can’t have semi auto shot guns they have many lever actions in an AR platform 

Winchester model 88 was a lever action.
but a liberal probably couldnt tell it from the look alike semi auto model 100.
 so gun expert reporters who call all semi autos machine guns or"deadly high capacity assault rifles" will probably label the 88 as a deadly lever action assault rifle.