The phrase 'legitimate platform' is correct and usable in written English.
You can use it when you want to refer to an official or accepted system, method, or procedure. For example, "The government has set up a legitimate platform to provide businesses with financial aid during the pandemic."
"But if the Senate charges him with any kind of ethical violation, that creates a legitimate platform for attack".
They want to avoid repeating the early days of digital, when there was only one major legitimate platform, iTunes, which could largely dictate the terms of licensing deals.
Roberto Lovato, a co-founder of the group, said, "We are thrilled that Dobbs no longer has this legitimate platform from which to incite fear and hate".
More recently Fruit Ninja and Angry Birds proved that smartphones can be a legitimate platform for casual games.
It also doesn't hurt that Windows Phone is generally being seen as a more legitimate platform as great device makers like Nokia and HTC put their efforts behind it.
The maturation of India's mobile network into a legitimate platform for software services on par with the U.S. is critical to why India's fintech story is happening now after a decade of promise.
With four cores, Apple could turn the iPhone into a legitimate gaming platform.
Meanwhile, Tumblr was maturing from quick GIF reblogs by scene kids to a legitimate blogging platform under its new owner Yahoo.
This would impede, of course, the efforts of marketers using Twitter's legitimate advertising platform to send DMs, something that is part of the flow of a few of Twitter's ad products.
Behance launched in 2006 amidst this changing landscape with the goal of finally providing creative professionals a legitimate, professional platform on which to showcase their talents and regain control over their work.
But this hybrid of totally gratuitous gore-porn mixed in with the kind of penis-enlargement-pills-clickbait tone of voice that no legitimate media platform or even brand would be caught dead using manages to be shockingly monstrous.
