I guess the common thread is that these services complement your browsing experience, i.e. they'd often be used in conjunction with Firefox - as opposed to, say

I guess the common thread is that these services complement your browsing experience, i.e. they'd often be used in conjunction with Firefox - as opposed to, say, Thunderbird. But yeah, the main reason is likely the stronger Firefox brand, and the biggest risk is indeed of weakening that brand. Then again, it could bolster it as well: Firefox Send is a very useful service, and can be used to make people familiar again with Firefox as the relevance of the browser has declined. (The specific issue with the "Charging for Firefox" articles, was, I think, that the root source of that was an interview with a German website, causing details to be lost in translation.)