This reminds me on Flickr - bought by Yahoo and all went down the drain. Like really fast.
There was a campaign (I had some part in it) "Think, Flickr, think!" reminding MGMT what the core values and assets of the platform where.
So Affinity, make no mistake: the number 1 reason why MOST of us are here: no subscription model. It you turn to subscriptions, we turn to Adobe. It's as simple as that. Don't be so confident about UX, performance and all the bells & whistles. You made an extraordinary software, but the unique selling point is - no subscriptions.
You want to increase shareholder value? Fine, rise the one-time prices. They are ridiculous low anyway.
Think, Affinity, think!