"Unlimited connections" sounds amazing. One subscription. Your whole family. All devices. But there's always a catch.
The catch is usually a fair use policy buried in the terms. Or a hidden limit on simultaneous streams from the same IP address. Or throttling after a certain amount of usage.
A transparent British iptv reseller will tell you: "You can use it on multiple devices, but only one stream at a time unless you pay extra." That's honest. That's fine.
The British iptv service I use offers two simultaneous connections for the base price. Each additional connection is £3 per month. Clear. Simple. No surprises.
I tested a so-called "unlimited" IPTV reseller UK once. Four devices in my house. Two streams worked fine. The third stream caused all four to buffer. Turns out their "unlimited" meant "we won't block you but we'll make the experience miserable."
Ask the question directly: "How many simultaneous streams are actually usable before quality degrades?" The honest reseller answers with a number. The dishonest one repeats "unlimited."
Numbers are better than promises.