PLO10 with antes is the nuts rakebackwise (among the microstakes, where SNE is unrealistic) as it's essentially PLO18 but still with 7 VPPs per $1 of rake
, so SupN requires 400K-600K hands a year there and is definitely doable without moving up (I'm a nit with 0.18 VPP/hand, so for me it would take 560K hands, on the higher end), returns about 50% of rake due to the higher VPP/$ rate (in the second or further year), so, with 4.25% base rake, is equivalent to a 57.5% deal on a network with 5% base rake.
The only problem is that sometimes there are only a couple of tables going. Plus it's often a (relative) regfest, with merely 2 recreationals per table. And for first-world residents, the money made there is insufficient.