O-ring chains are supposed to have the lube oil permanently sealed behind the o-rings...
External oiling is for cleaning purposes. and don't use any abrasive scubbers that can damage the o-rings... ..or, penetrants that can get past the o-rings...
I don't like them much,.. as I had an o-ring chain lock up on me...
Grated,... it was a DP bike... (they don't like dirt).
Also,.. many chain waxes lubes are tacky,.. in order to not get flung off...
This ain't so good for dirt either...
If you ride 99% street, and don't live in a dusty area,.. I suppose they are okay...
Not here...