Internet service providers like Comcast and Verizon may soon be free to block content, slow video-streaming services from rivals, and offer “fast lanes” to preferred partners. For a glimpse of how the internet experience may change, look at what broadband providers are doing under the existing “ net neutrality” rules.

When AT&T customers access its DirecTV Now video-streaming service, the data doesn’t count against their plan’s data limits. Verizon, likewise, exempts its Go90 service from its customers’ data plans. T-Mobile allows multiple video and music streaming services to bypass its data limits, essentially allowing it to pick winners and losers in those categories.

Consumers will likely see more arrangements like these, granting or blocking access to specific content, if the Federal Communications Commission next month repeals Obama-era net neutrality rules that ban broadband providers from discriminating against lawful content providers. The commission outlined its proposed changes on Tuesday, and published them Wednesday. The proposal would also ban states from passing their own versions of the old rules. Because Republicans have a majority in the agency, the proposal will likely pass and take effect early next year.

Because many internet services for mobile devices include limits on data use, the changes will be visible there first. In one dramatic scenario, internet services would begin to resemble cable-TV packages, where subscriptions could be limited to a few dozen sites and services. Or, for big spenders, a few hundred. Fortunately, that’s not a likely scenario. Instead, expect a gradual shift towards subscriptions that provide unlimited access to certain preferred providers while charging extra for everything else.

Net neutrality advocates have long worried that these sorts of preferential offerings harm competition, and by extension, consumers, by making it harder for smaller providers to compete. A company like Netflix or Amazon can likely shell out to sponsor data, but smaller companies don't necessarily have the budget.

"Net neutrality is incredibly important for small startups like Discord because all internet traffic needs to be treated as equal for us all to have access to the same resources as the big companies," says Jason Citron, co-founder and CEO of the videogame-centric chat and video-conferencing app Discord. Citron's company is well funded and boasts 45 million users. But it competes with larger players like Microsoft's Skype, Google's Hangouts, and Facebook's WhatsApp. Even if Discord can offer a better experience for gamers, bigger companies might be able to gain an advantage by partnering with broadband providers to prioritize or subsidize their apps.

For even smaller video providers, the end of net neutrality could be dire. "We believe this would affect more than just our voice and video equipment, but our entire ability to host folks interacting across our services," says Nolan T. Jones, managing partner and co-creator of Roll20, a video-conferencing and community platform for tabletop role-playing gamers.

It can be hard for smaller companies to even get a meeting with large broadband providers. In 2014, when T-Mobile launched a program that exempted music streaming services from its users’ data caps, the founder of streaming service SomaFM complained that his company had been left out. T-Mobile added SomaFM to the program a year later, but it’s not clear how many customers SomaFM may have lost in the interim.

The FCC ruled earlier this year that these data exemptions, known as "zero rating," are permissible under the current net-neutrality rules. Once those rules go away, the companies will be free to experiment with more drastic measures, like slowing connections to data-hungry apps.

Even Verizon's "unlimited" plans impose limits. The company's cheapest unlimited mobile plan limits video streaming quality to 480p resolution, which is DVD quality, on phones and 720p resolution, the lower tier of HD quality, on tablets. Customers can upgrade to a more expensive plan that enables 720p resolution on phones and 1080p on tablets, but the higher quality 4K video standard is effectively forbidden.