How to know about RP giveaways?

A ton of streamers and youtubers give away RP. It is hard to follow and keep track of all of them, so I'm wondering if there is somewhere that says which streamers are doing RP giveaways. I know there is a list of league partners. Also, are there any sites like r/LeagueOfGiving, it is kind of dead and I was hoping to get some RP for Deathsworn Katarina on sale in my shop right now, but sadly have no money. Please don't post ads for "free RP" scam sites. Just looking for legitimate giveaways of RP.