Companies consist of not just developers, but also managers (sometimes also called "decision makers"). Often it's the manager's job, not the individual develop

Companies consist of not just developers, but also managers (sometimes also called "decision makers"). Often it's the manager's job, not the individual developer's job, to register to such things. Then they will take care of the emails, possible negotiations, and all other consequences of such subscriptions. Don't get me wrong: Often these managers do have a Github account (and many more accounts). But offering LinkedIn is a safer bet to address almost all of these decision makers.