TMS

I can't imagine a scenario except hosting a game/webserver from your home where you would be in a disadvantage against people who have static IPs.

https://www.telekom.hu/about_us/press_room/press_releases/2017/october_31 (English Press release from Telekom Hungary)
https://www.hwsw.hu/hirek/57994/telekom-gigabit-internet-gbps-savszelesseg-letoltes-feltoltes.html (Hungarian article)
 
From Telekom's English press release:
A little more than a year ago one of the ISPs in Hungary (Digi) started to offer gigabit internet options for cheap (less than $20). Another one (Telekom HU) started to provide a gigabit subscription a year ago too in response and now it's providing a new subscription with a maximum download speed of 2 Gbit/s.
 
Hungarian quote from the Hungarian Article:
The same quote translated to English:
So in response to the higher maximum bandwidth, Digi responded with only providing their largest, gigabit subscription to new customers, at least on their FTTH (Fiber To The Home) network. I have checked some addresses, where I know they provide internet service, and this is true, although they still provide smaller subscriptions on some addresses on their FTTB (Fiber To The Building) network.
 
I've made a little table showing some of the offers of the 2 companies. Prices can be different in other regions, especially at Telekom. I think this is because Digi is a smaller company and they built most of their own network, meanwhile Telekom has the largest overall availability in the country, with variable technologies and available subscription offers. This is mostly due to Telekom (as far as I know) is renting some of their parts of their network from local, really small ISPs.
I included guaranteed speeds, although it's usually not an issue for ISPs here to provide the maximum speeds they advertise.
 

  Digi Telekom   DIGINET 1000 FTTH DIGINET 500 FTTB DIGINET 100 FTTB OTTHONI INTERNET 2000 OTTHONI INTERNET 1000 OTTHONI INTERNET 250 OTTHONI INTERNET 100 OTTHONI INTERNET 50 Maximum Download Speed 1000 500 100 2000 1000 250 100 50 Maximum Upload Speed 200 200 100 500 200 20 10 5 Guaranteed Download Speed 300 200 25 300 300 15 1 1 Guaranteed Upload Speed 50 50 20 50 50 4 1 1 Price (HUF/USD, 27% VAT included, without loyalty programs) 3300 HUF/~$12.5 2900 HUF/~$11 2500 HUF/~$9.5 11631 HUF/~$43.5 6659 HUF/~$25 5816 HUF/~$22 5057 HUF/~$19 4467 HUF/~$17  
 

They can use DynamicDNS. And as I mentioned, these are residential subscriptions, I don't think much people buy servers to run them off from their home connection.

Why would you consider a connection with dynamic IP half a connection?

What would the vast majority of users do with a static IP that they can't do with a dynamic IP?

Why would you consider a connection with dynamic IP half a connection?