How does one know that? No list of models. No portraits. No information at all. Just a blind signup. In other words "trust us that we have someone you want to hire for a shoot- without actually knowing anything about us." Not going to happen. And those corps that do, they might not want to actually do business with. Most in the biz see that and just go to another site. With a minimum of 2500 governments and businesses hacked by eastern European groups and China, it's not likely that many producers are going to sign up completely blind.
Is it any shock that most sites that had that practice went out of business last year?
The website is the first thing that a prospective producer, agent, model, etc. sees and the recent practice of "hidden" websites just tells them "go elsewhere".
Tmodels might have something a producer wants, but there's no way for a producer to know that. Effectively, a producer will see the site and think "no way I'm giving out corporate information completely blind."
He/she's going to think one of the following upon seeing a hidden site:
1. It's not a real site.
2. It's a scam site. Hackers, ID theft, account numbers theft, etc.
3. If it's a real site, there's something wrong with the business, such as a lack of experience, models, professionalism, etc.
4. If it's real site, there is some reason they don't want anyone to know anything about them, such as legal problems, outstanding warrants, problems with their government, etc.
5. If it's real site, is it just an escort site and not about models?
6. If it's legitimate, why should I waste my time with them if they won't state up front what models they have, what the rates for shoots are, and so on? (Time is money)
Those six alone mean that most will simply go on to the next site that actually has what they are looking for. It's easy enough: most sites don't operate that way, actually wanting the business, and so producers, photographers, etc. just go to sites that have actual information. Getting passed over is not the way to get business.
A producer complained a couple years ago about trust being the basis for the business when a model kicked him in the teeth. It's largely true: there being no way to verify much of what is claimed, you have to go on word of mouth. It's a matter trust. When sites say "I have something to hide", it raises immediate suspicions.
And then they go elsewhere.
Honestly, I don't know why I'm bothering to state all this. Do these outfits actually want to stay in business? It should be pretty obvious that if no one knows anything about a company, no one can do business with it. The appearance of dishonesty has wiped out a lot of corporations.
So what does a photographer or producer do? If he/she knows whom he/she wants to photograph or videotape, then the first thing to do is contact the agent. If that information cannot be found (not uncommon), then it's a long search via website. For a large company, this is done by employees tasked with that job. For a small company, the producer(s) will do it him/her/themselves and that means a lot of time looking if the model is not in the handful of most popular models. It's often advantageous, too, to use models who are not yet popular, because of the lower fees, which means looking at various agencies' sites to see whom they have and if they fit the "look". Someone who is starting out with no reputation might look as good as Veronika Zemanova, but if she are unknown, the fees are a fraction of what VZ would charge for a photoshoot. When sites hide, at a minimum it means that much more time wasted with hours or days added to the mix (assuming the site is real). Plus few are going to bother, for the reasons stated above.
My suggestion to make it easy for producers to pick and choose models are:
1. At a minimum: Photos of facial portraits, one in best makeup, one not in makeup. Other portraits, to give an idea of colors would be unmadeup portraits with a neutral background, and portraits with several colors in background, because one classic mistake made is that some individuals look good in some colors and against some color backdrops and look poorly against other colors.
2. A full body shot. Bikini is fine.
3. Other photos, if they are particularly outstanding.