Proxies are the layer that decides whether everything else in your setup matters, and they are also where most budgets get cut first. It is worth being blunt about the order of importance: a modest fingerprint behind an address only you are using will outperform a flawless fingerprint behind an address two hundred other operators are sharing. The platform does not need to compare browsers when the network has already answered the question.
The categories are a spectrum rather than a ranking. Residential and mobile addresses look like ordinary consumer connections and carry the strongest reputation, at the highest price per gigabyte. Datacentre addresses are fast and cheap and are recognised as datacentre addresses by anything that checks, which makes them entirely appropriate for research and price monitoring and a poor choice for consumer platforms. What matters more than the category label is exclusivity: how many other people are behind the same address, and whether you can find out.
Two questions are worth asking any provider before money changes hands. How long does a session hold on a sticky address -- because a proxy that rotates mid-login costs you the login. And what is the actual pool size in the countries you need, as opposed to worldwide, since a large global pool can be thin in the one market you care about.
When it is set up, check the pairing rather than the proxy alone. Open a profile through the address and confirm three things in the fingerprint checker: the WebRTC test shows the proxy exit and nothing resembling your own network, the timezone follows the exit country, and the language header is plausible for that location. A mismatch there is the cheapest signal a site can read, and it undoes good proxies as thoroughly as bad ones.
One last thing worth building into the routine: re-test the addresses you already have. A proxy that authenticated and passed a check three months ago can be blocked on a specific platform today without failing any generic test, because reputation is per-destination and moves. When a profile that worked yesterday starts behaving oddly, the address is the first thing to check and the last thing most people suspect -- and checking it takes a minute against the hours usually spent looking at the browser.
A note on how to read any proxy provider’s numbers, including the ones on this page. Pool sizes are quoted globally and what you need is the country you actually work in, where a headline of millions can thin out to a few thousand usable addresses. Bandwidth is quoted per gigabyte and browsing a media-heavy platform consumes far more of it than the estimate in your head. And uptime figures describe the network rather than the reputation of any individual address, which is the thing that determines whether your account has a quiet week. Ask about the country and the exclusivity; the totals are marketing.
Finally, keep a note of which address is attached to which profile, and change it as rarely as possible. Continuity of address is something platforms notice: an account that has browsed from one IP for months and suddenly appears elsewhere has produced an event, whereas the same account on the same address is unremarkable. Rotation is a tool for scraping, not for accounts you intend to keep.
None of this is specific to buying from a partner rather than anywhere else -- it is how to buy proxies at all, and it applies equally if you go elsewhere. The offer exists because these are questions our customers ask constantly, not because the answers change depending on where you buy.