Use https://www.qrcode-monkey.com monkey to get a QR code with all the modifications + logo for free. I did not see any pricing on the website. It is 100% free for commercial use. @leofinance could use their API to create higher quality custom QR codes.
We definitely need all the marketing we can get for HIVE. That is not enough. We need more DAPPs building on HIVE. Most of the top account creators are DAPPs. Onboarding developers through projects such as Invennium and @vsc.network is going to extremely important.