Surveys don't mean a whole lot, especially as you say- many grids are under represented for several reasons, one is their residents are primarily European and/or non English speaking. Metropolis for example is based in GERMANY, with much of the residents and all in German.
Other reasons include not even knowing about (or caring) this web site, or the survey enough to even bother with coming here and filling the survey out knowing it doesn't amount to anything of real world importance.
It's been my experience over the years with things like surveys that llike voting in elections- a small fraction of the whole even bothers, the other 80% are happy to sit back and let the 20% vote or fill out surveys.
100 surveys from osg out of 3,500 "active" users?
Inworldz, 160 filled out surveys out of 7,201 "active" users? Avination shows 1,821 "active" users and 11 surveys, given the numbers you cite- proportionally the surveys completed per 1000 "active" users are not far off with those three, but it doesn't even amount to 3% of the ACTIVE users let alone the account holding numbers these grids all claim they have.
Broken down:
OSG 2.8%
Inworldzzzz 2.2%
Avination 0.6
Whether it's 2.2% or 2.8% or 0.6% doesn't matter, the numebrs are still far too low to be an accurate representative.
The logged in concurrently numbers are the ones that show what's happening and as I remember neither inworldzzz or avination ever showed much more than 125 logged in at any one time, osg even less, usually the numbers were half that.
People are not going to rush out and buy a hosted sim based on an annual web site survey, they are going to grid hop from one grid to another and choose mostly based on where their FRIENDS hang out.
There's more to a grid than numbers, a substantial one with me is how I as a resident is treated, everything else is a secondary issue.
No matter how nice the showroom window, products or prices were I would never patronize a store whose sales people either ignored me, were of no help, or went out of their way to annoy me or make me feel I was either not welcome or a burden on them, and that was the case with inworldzzz.
Avination staff on the other hand were extremely welcoming, helpfull, friendly, and my sims installed instantly on payment and always ran exceptionally well.
The greatest grid in the world doesn't mean much if it has a dingbat who "patronizes" and "disses" people in their public forums and in world.
The ONLY reason I am not there today on Avination with at least 2 sims is because I host my own sims from home.
Another issue with inworldzzz was the fact they were selling "used" sims sans the $75 setup charge, the actual effect of this was no one could sell their own sims because the grid owner was undercutting the residents by offering used (abandoned) sims for $75 with no set up fee and the month's tier included.
Anyone doing the math can easily figure out that if you had a sim you wanted to ditch you lost money on it, in most cases all of it because no one is going to pay $75 for a sim with half the month's tier used up when they can get one for the same price and a full month included.
I knew one lady whose sim name was her registered business name, and she was furious after abandoning it that it was sold "used" with the name intact and they refused to change it.