So they've done their users a favor by providing a consistent experience over all supported platforms?

I'd really like to listen in to one of the meetings where decisions to do such kind of blatant platform-abuse is being discussed. Possibly alternatives A/B/C (you always have to have 3 alternatives, right?) are the Ask-Toolbar, a bitcoin-miner or adding the end-user-PC to a botnet for DDOS-extortion, so we can be lucky that they agreed to do "A".

That's pretty much the definition of "to stay", e.g. keep doing what you've been doing.