Spoiler
I believe the policy of some sites is like trying to salvage the last remaining bits of a dying industry. The players are getting increasingly better (at HE, at least), the fish are losing money faster and therefor the sites are doing all these retarded stunts to protect them for just a while longer.
In my opinion, this is a bad attitude, because its premise is: "the recreational player pool is a stable variable an it will eventually dry out", like if there are like 5000 recreational players on that site and they have like 0.5 million usd, every bankroll busted makes it 5000-x and 0.5mln - x.
Instead, the recreational player pool should be viewed like a renewable source. What I see lacking is advertisement and progress in the sites themselves.
The discussion started with pokerstars, I guess nobody doubts that pokerstars have made their work with: advertisement, spread of poker, software etc.
I do believe, that grinders did have some impact on pokerstars success, but the main reasons are different.
The sites I see, doing stupid stuff, like anonymous tables(microgaming), limiting multitabling (888), AUTOFOLD PREFLOP (srsly, wtf, microgaming), complaining about pokerstars success (the ceo of party, if I'm not mistaken). Are doing next to nothing, compared to pokerstars (except partypoker, which, imo, has other issues). And, yes, it is true, that pokerstars are a lot bigger and have more resources, but some simple changes (sometimes in the attitude only), can make the difference.
While party poker is complaining about stars' success, they are doing nothing to improve their software, lobby and game availability, even losing to iPoker (the most tilty place I've ever played in) in traffic.
imo, 888 pokers software has gone worse (maybe this is one of the reasons, why they limited their playable table count), they have bad support (with the exception of cashier support, but they are only helping with deposits and bonuses, while some issues, that are solved by email might take a very long time).
microgaming software, lobby layout and game structures have gone for the worst (correlates with their traffic drop in the recent year(s) ).
ah, to put this all in short: I fully agree with patszerdonk: advertisement (to attract recreational players to poker AND your site), software (to keep them there), support ( to keep them there even when problems arise), are the main tools in making your site better.
Instead, poker operators are acting like the recreational players, new players, etc. are no longer available, therefore the industry is dying and they must keep the recreational players protected for as long as they can, to salvage the last pennies in rake.