Weird. Company full of Open Source guys, but I think they didn't get the right advice on a business model. The reason why MIT/BSD/Apache licenses are there is that there's a group of people who want to let companies use their stuff. If you want people pay you, you just release commercial software, without showing the source. License is something that once put in, it's too late to change later, and not disrupt how you…
Redis itself IS NOT changing licenses, and if you only use the core Redis product you are unaffected. This license change only applies (or _will_ apply, I guess) to some source-available addon Redis modules. (I'm not sure if any existing open-source modules developed by Redis Labs will have their license changed, or if this will only apply to modules published after the announcement.)
Full disclosure: Am a Redis Labs employee, although not here in any official capacity.