You're not the only one many users have reported this same error, even if they rarely use the Market. It's usually caused by too many requests from your IP address, not necessarily your account. That can happen if you're on a shared or dynamic IP (like mobile internet), or if something in the background is making requests to Steam (like a browser extension, app, or script). Even if you don't use the Market much, the block can still stick around, especially if your IP was flagged. It's not always something you can fix yourself. Sometimes switching networks (like using mobile data or a VPN) works, and sometimes you just have to wait it out. Steam Support usually won’t lift the block manually, so the best move is to wait a while, avoid refreshing Market pages too much, and try from a clean browser or different network.

Originally posted by Великий Цар:

You're not the only one many users have reported this same error, even if they rarely use the Market. It's usually caused by too many requests from your IP address, not necessarily your account. That can happen if you're on a shared or dynamic IP (like mobile internet), or if something in the background is making requests to Steam (like a browser extension, app, or script). Even if you don't use the Market much, the block can still stick around, especially if your IP was flagged. It's not always something you can fix yourself. Sometimes switching networks (like using mobile data or a VPN) works, and sometimes you just have to wait it out. Steam Support usually won’t lift the block manually, so the best move is to wait a while, avoid refreshing Market pages too much, and try from a clean browser or different network.

Tanks for the reply.
Yeah, i get how that works.
The problems is only my devices are on my network i I'm not using my phone ether for marketplace.
So for the life of me I can't figure out how i sent so many requests to get blocked. I don't have any extensions or anything.