I think 'only or more' isn't at all clear and if it's a phrase in common usage to you (which I accept is possible) it's one I think I've never heard (US West coast)--maybe it's a regional usage?

I've concluded you mean to say either ask for/offer only these things, or make these requests the majority of what you ask for/offer. This is a sensible thing to suggest to make this challenge work, but I think what you mean to say is, [request] only or primarily [these things]. More might mean more than one, more than last year, more than not (majority), more than average... Now that I understand what you mean, I don't particularly think you need to clarify further, but I think you might opt to. Or not--I'm not especially invested. ;)