On my recent first and so far only visit to Al Mourjan for a shower yielded the same result. Didn't really think anything of it at the time - more so as a South Asian invasion of space cultural thing - but the guy wanted to make small talk and didn't want to seem to leave. Never even thought of tipping him because it's just something I don't do in premium lounges, nor should ever be expected.

I thought it was just me or this one guy, but the comments put it into a different perspective.