thanks, @brunotreves, I don't know what I did to get it. :-) Maybe it is partly what I didn't do? I know you can lose it for certain things.
I thought I'd best go off and find out how I might have done it. I think it may have been from commenting above anything? https://steemit.com/steemit/@arnoldwish/18-steps-you-should-follow-to-increase-your-reputation-score