Time travelers from the future have already seen future (therefore dirtier) porn, they’d have no need for the current internet.
My friend “Mullet Man” The Oakview Time traveler, exists but due to government groups trying to capture him and his machine, he took it and himself back in time when he would be safe—1959. Why then? he said simply “I like Ike”. He said he would go to San Fernando Valley in California or Texas? I haven’t heard from him since! He said he would come back with money—but so far I haven’t seen a cent.