"S2 cells & GO: the various levels applied that we're aware of atm"

#PokemonGO: By now even occasional Silph traveler must have noticed that s2 cells are becoming big and dictate a whole lot of rules applied behind the scenes of PoGo.(Cells explanation by Calmarius.)Since it's kind of starting to make my head hurt I thought I'd put together a list of the various levels, where are they applied and where to look for some more info on that particular topic. Please take note that some topics are rather old but despite that many could use further research - if this summary inspires you to pick up the work, go for it!Disclaimer: credits go to OPs, obviously :)size 6 - geoblocking (NKorea etc.)size 6 - former Beasts distributionsize 9 - regionals distribution (WIP)size 10 - Pokemons' "caught" location (includes raid bosses)size 10/11 - weather (inconclusive atm)size 12 - Ex-Raids distributionsize 14 - possible biomes (WIP) + 1 more post supporting size 14 + another post inclining towards size 12size 16 - IG world display (gyms, stops)size 17 - gyms & stops placementsize 20 - spawns placementsize 20 - gyms' location - important for determining Ex-Raids eligibilitysize 20 - eggs pickup & hatch location (sorry couldn't find link)It's shaping up pretty well, isn't it? Some of these can be cross-linked with research into OSM (most notably biomes), but that might be better confined into the individual debates.I tried not to forget anything, but if I did - let me know...:)edit: added u/Tntnnbltn's research & updated wording via /r/TheSilphRoad http://ift.tt/2qDF48G