On engagement - we use various tools to see what people are liking and sharing. It shapes our thinking in a lot of respects so we can focus the attentions of a small team, to make sure we're doing the things that are most effective.
All of that said, however, there are also moments we disregard "engagement" because, as I said above, our social media channels are also a source of information for supporters that you'll read, find important but not "engage" with. That's obviously important to provide that, and we'll never move away from it. We might tweak things so we get to a stage where we think you're getting the information the best way you can.
And building on that - no, it's not exclusively a marketing tool. If anything, it's a marketing tool only by extension of whether people like what we are doing. Our intention is to show the best moments we can from matches, highlight our players and their personalities so that supporters feel closer connections with them, tell our stories and also tell the stories of our town and its people. Amongst many other things.
I would say none of those are intentionally "marketing". They tell the world what our club is all about, and you might be attracted to it as a result, or enjoy it as a supporter. That's what we use social media for. It isn't to blatantly sell things (except for the odd moment we might say buy a ticket, or come to our hospitality event).