So, what you've done is give some random company access to all your accounts.

Some company that, like the providers of AdBlock, Ghostery, StartPage.com, WOT, the Brave browser ... amongst far too many others ... get sold, change personnel, deviate from their original mission and start making use of your data for commercial (or worse) purposes.

Only now, instead of there being multiple businesses, each with access to smaller subsets of your data, there is one with access to it all.

I'll give that a miss, I think.