Note: it's not the submittal that needs to not look spammy. It's the WEBSITE.
The submittals are all going to look pretty much the same: because the kind of information on the websites is pretty much the same. And, at the end of the day, what's on the submittal really doesn't matter that much. It's just a hint about where some information may be found online -- and editors don't really even need a _hint_ (we can find sites without even that).
Given the hint, we go look. If the hint is promising but not quite right, we sniff around (not much different than we'd be doing without a hint). And if we find a website--however we originally found it--all that matters is what's actually on the website. The hint, at most, suggests certain kinds of information that we might want to watch for, so we don't accidentally overlook some important aspect of the website.
So the website has to stand out from among the affiliate doorways. Quickly.
The submittal is a completely different problem. By nature it's going to look spammy because it's surrounded by ten thousand other submittals, all spammy, and all trying to look non-spammy (that is, all trying to look exactly like that one non-spam suggestion.)
Someone will look at each suggestion, eventually, sure. But ... people look at suggestions because they're trying to find good sites. So a spammy-looking suggestion isn't likely to be a high priority.
I don't know of a solution to that. Kill all the spammers, maybe. But spamming works by obtruding the spammer between potential customers and genuine businesses. The whole technique is to make it hard for customers to find real businesses. And, hey, the technique works--the customer and the real business are both hurt--even when the spammer doesn't make a dime. Economically understood, spammers are negative-sum actors: like crackheads who'll do thousands of dollars damage to a house or car, to steal something that they can pawn for ten or twenty dollars, they cause orders of magnitude more damage than their profit.
And the real businesses are hurt. You're seeing it. Surfers are hurt (and with them, the editors who try to find good sites to surf.)
One editors' reaction is to rely more on non-spammable sources for business URLs. It's hard for a spammer to get away with painting his URL for "find-a-florist-now-now-now.com" on the delivery trucks owned by "Alice's Flowers ("serving Oak Grove, Knob Knoll, and nearby farms since 1973".) So a notepad in the car is likely to yield a trickle of 99%-good URLs -- unlike the website submittal process.
And one appropriate BUSINESS reaction is to GET YOUR URL ON YOUR FOLKS' DELIVERY VANS. Because THAT'S a GUARANTEED NON-SPAMMY-LOOKING URL suggestion.
But that's just one suggestion: just think outside the (submittal dialog) box, be where the spammers aren't, leave footprints around delivery of goods and services in the real world. And the real-world shadow that is the web will be affected.