1) would offer clip sales, phone sex and custom 'items / services' that models could offer (must be compliant with TOS / laws, of course). Many models sell tangible items, custom requests, Snapchat, Kik, ect. and other services from their profiles using tokens. Being able to actually sell these from the platform instead of the model having to manually fulfill these requests would probably streamline the entire thing and might even increase the number of sales a model can make. Especially offline sales.
2) GOOD SUPPORT - I still get shocked at the level of support a lot of sites have. I've gotten used to it, and now I'm shocked when I encounter a pro-active company with good support, but some crappy support will still shock me every once in a while. Not gonna name names, as many of them are good partners of mine, it's sad to say.
3) Active DMCA monitoring and takedowns - This affects the network's bottom-line just as much as it affects the model's bottom-line. Aside from that, the networks know more about intellectual property laws and DMCA take-downs than your average model, especially a model new to the industry.
4) Good model pay - not only a good percent, but solid paying traffic as well.
5) No charge-backs - Anyone who's had a massive charge-back will probably agree. It sucks seeing a negative number in your earnings.
6) Solid affiliate program - This is a little narcissistic of a request, as I would definitely benefit from it, but affiliate marketing is insanely effective. Why else would the bulk majority of the sites be doing it? I wish I could get ROI stats on affiliate programs vs media-buy. Adult traffic is cheap as it is, but affiliate marketing is performance-based, so as long as the program is well thought-out, it'll never lose money.
7) Huge marketing warchest - Very important, especially right at the start. Unless a model plans on doing all her own promotion, the site traffic (and quality) is very important. If the network doesn't have an established member-base and tons of direct traffic, media-buy is important. If the network can't handle a lot of the other marketing channels in-house, they'll need the budget to outsource. Even if they are handling it in-house, they'll need the budget for staffing.
8) Solid code-monkeys - It's all about the devs. These are the people that are going to be making sure the site functions properly, constantly be trying to optimize things, make sure it doesn't break, make sure there's no security flaws and constantly have new features in the skunk-works. You don't want to team that builds a platform, feels it's 'good enough' and does nothing outside of maintenance.
9) Plenty of contests - Contests are fun. I love the sites with tons of contests.
Meh, could probably go on, but that's a pretty solid checklist so far I think