I'll start by saying we're not on reseller packages and but do offer a very popular reseller program. Generally I find most will not reveal they're reselling our services and in most cases the client won't look to in-depth to find who the 1st provider is.
You might get your WHOIS checked out, yes. No problem that won't mention our name. Only the technically minded and those really wanting to figure out for whatever reason will look. Your average local business owner isn't going to go on a mission and find out if you're a reseller or not, if they like your services and have a need for it, they'll signup.