Currently yes, I pay flat fee per month, however, my plan is speed-limited.
For the high-speed plans, there is always stated data limit. If you want to transfer more bits, like movies or sync big folder mentioned above, it is cheaper to use fixed connection (unlimited at commonly achievable 40 Mbps FTTH is about the same price as 20 GB over theoretical 14.4 Mpbs HSDPA; about 24 EUR/mo, both by the same provider [Orange]).
But still, if you want just few GBs per month, do not need fixed connection, why would be the provider bothered by tethering? Browsing and mailing is still more comfortable with laptop, than phone.
For the high-speed plans, there is always stated data limit. If you want to transfer more bits, like movies or sync big folder mentioned above, it is cheaper to use fixed connection (unlimited at commonly achievable 40 Mbps FTTH is about the same price as 20 GB over theoretical 14.4 Mpbs HSDPA; about 24 EUR/mo, both by the same provider [Orange]).
But still, if you want just few GBs per month, do not need fixed connection, why would be the provider bothered by tethering? Browsing and mailing is still more comfortable with laptop, than phone.