Curiously if you try making a planet orbiting system barycenter of a W-UMa-type system, you get planet's average temperature zero K.
Because it's just like it were orbiting around nothing.
However it's also curious that W-UMa type binaries (as well as some Algol, RS CVn and cataclysmic variables too) often show indications of additional third (or even fourth) bodies in outer orbits, hinted by small orbital period variations.
The additional bodies are usually low mass stellar objects (mass ranging between 1-0.2 Solar masses, sometimes even >2 Mso in massive systems). Nevertheless, and according to assumed orbital inclination of the object, even VLMO and brown dwarfs are inferred to orbit eclipsing binaries.
Here some examples:
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44 Bootis B-C: recently astronomers would have detected hints of a brown dwarf (nearly 48 times the mass of Jupiter) in wide orbit (<10 AUs). Though a bit bizarre configuration since the 44 Boo BC is already in eccentric and not so wide orbit around 44 Boo A brighter primary.
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V471 Tauri: the most unusual system so far. A K0V+wd tight binary with third object, in substellar regime (nearly 50 Mj) in wide orbit (10.3 AUs e=0.3).
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HW Virginis: a tight sdB+late M-type dwarf binary system with multiple planets.
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VW Cephei: quite a curious systems. Latest paper about this object claims a third (stellar) body in wide and eccentric orbit around primary, plus hints of a fourth low-mass (sub?)stellar object (<<0.2 Mso) in tighter one, but possibly in resonant configuration with third star.
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BM Ursae Majoris: a third object with possibly less than 70 Jupiter masses is thought to be located within 10 AUs from W-UMa (or RS CVn, I don't remember) type system.
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BH Virginis: another 60-70 Mj third object inferred. Around 18 AUs away from EB system.
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Y Sextantis: here third object is low mass stellar but fourth putative one is likely substellar (43 Mj at nearly 60 AUs).
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OY Carinae: cataclysmic variable. Here possibly a third superplanetary object is inferred (<16 Mj at >17 AUs).
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Z Chamaeleontis: a classical CV with a putative third body with >10 Mj at >8 AUs.
I'm going to provide paper links but in next thread. This one is just too long