Once, before Bitcoin, I did a lot of volunteering for a charity project where I lived. I really enjoyed the time I spent doing it, and it was a pretty vibrant little project. It got to where I was spending so much time doing it, they offered me a little part time job. I was young and I probably should have said no. But instead, I accepted. That ended up making it less good. They weren't paying enough for anyone to sustain themselves on the income, and now I was feeling like we were in a employment relationship -- which meant I expected to be compensated fairly. I wish I had just remained a volunteer and made it fit in with some other kind of paying work.

All this to say: it is perhaps better to pay people what the job is worth or not at all. Charity rates can lead to people feeling grumpy. Now, perhaps you could arrange to distribute a thank you gift of sats every year around the holidays or something. Still reward people a little, but make it feel more like a really heartfelt thank you.

It's a little unclear from your post whether you plan on advertising these roles or you already have them filled. If you plan on advertising them, you could advertise them with the rates you think are fair, but I suspect if they are far below market, you won't find the people you want. It may be better just to ask for volunteers to do the work.