The list on that saw (18inch) is now $359 (in the West). Most dealers make less than 20%, some as much as 24%, some as little as 18%, and that's before inbound freight etc.
There will always be a small fraction that break the rules, but Stihl has at least tried to stop internet sales and got it down to a low level. Stihl buys from the obvious reseller and tracks them back to the dealer. They get one warning, then Stihl pulls the dealership. Sure, it just drives the few into deeper cover (employee sales etc), but the message got though.
Husky/Dolmar will no doubt go for the obvious low hanging fruit initially... With a "level" playing field, their own dealers will be the best source of "who's breaking the rules".
Kind of interesting that Husky and Dolmar both came to the same "no internet" within a couple of weeks?