Rescuing a unit with bad viewability

Rescuing a unit with bad viewability
Got a unit at 38% viewability dragging RPM. Step by step:
— Pull active view % per unit (it's in reports if you dig)
— Anything under 50%: the unit's below the fold and never seen
— Move it UP one content block, or make it sticky within the sidebar
— Lazy-load it so it requests only when near viewport (better fill)
— Recheck after 3 days — aim 60%+ viewable
Moved one rail unit up two blocks, viewability 38→64%, that unit's RPM doubled.
Test it on one page first.