Thats interesting.... I've thought about going skimmerless and just doing a fuge esp since my skimmer does not produce that much waste, how was the transition to skimmerless and what kind of tank do you run?
For me, my bioload was low so I simply took out the skimmer and added chaeto and a light. Truthfully, I don't know if going skimmerless really adds anything to this tank - in my last tank (decades ago!), going skimmerless led to tons of feather dusters appearing in the tank and even on the glass. Nitrate/phosphate are generally zero to the next lowest value on Salifert/Elos test kits at the LFS (I have API for nitrate, which I don't trust, and don't feel like buying kits which I really wouldn't use more than a few times or during emergencies). I do notice a bit of organic film in the refugium on the surface when I add enough food concentrate (Reef Chili), although that has gotten better with more chaeto.
I've found macroalgae with lighting (via refugium) to do a much better job at nitrate/phosphate reduction than when I was skimming/doing partial water changes/live rock and sand without macroalgae. When I had macro in the main tank, it still worked, but not to the same degree (dragon's breath, not as fast growing as chaeto). Now I have dragon's breath in the main tank (which really isn't growing much if at all), gracilaria in the main tank (growing), and chaeto in the refugium (growing).
I use a PAR38 grow bulb, so my lighting is under $100 including the mounting setup (the bulbs are really $12-30ish, and you can buy a simple clip on mount for $10), so it's also very cost effective.
Lastly, it's nearly maintenance free - sell/trade/give away/trash some chaeto every so often.
I sometimes wonder if a small skimmer for aeration and removing surface organics would really impact plankton levels . . . I may eventually add a small Tunze in-sump skimmer, as those are supposed to be more plankton friendly, but since things are filtered well and I like to keep things simple and maintenance free, I'll probably stick with what I have. My biggest challenge ATM is calcium/alkalinity supplementation - going to try Bettix bottles and manual dosing, although I may eventually try a pair of dosing pumps (not much room, tho) or a small calcium reactor.
I'm obviously a huge fan of chaeto/refugia filtering! The only drawback is needing a sump/space, although I do wonder if some gracilaria and dragon's breath under good tank lighting wouldn't accomplish the same thing. It's also cool to think that all of your tank needs can be solved with $20 of macroalgae.
I originally got the idea from having some sargassum in my old tank (as well as reading about algae scrubbers and using live rock/sand to reduce nitrates), which grew quickly enough to need harvesting but was otherwise well behaved and took care of microalgae problems.