This is a known method to level up Smurf Accounts to then sell.
I've always thought Riot should make it easier for players with Lv. 30 accounts to get an alternate account, because the options are bad for pretty much everyone.
Option 1: Buy it
Aside from me not being sure this is even legal, a lot of bots will be used to generate IP and XP for all these random accounts that will later be sold, hurting Dominion and ARAM queues.
Option 2: Level it
This means the player needs to grind 30 levels, IP for Runes and champions, spend RP in Rune pages (or I guess grind more IP) and this also creates an environment where new players are queued up with these smurf accounts and play against people who'll just destroy their faces without a chance of a contest, turning off a lot of new players who'll just feel bullied. And again, it's not like the veteran player just wants to dump newbies, they are just forced to do it in order to grind the account.
Riot, something needs to be done to offer better options for everyone.