There's been weird things happening all over the place with Let's Play videos.
Saga, at one point, 86'd any video that used the words "Shining Force". Regardless of whether it was a LP, or a podcast discussing it. The reason was, apparently, that they were to announce a new Shining force game.
Link.
Because the best way, apparently, to promote hype for their series is to ensure there isn't a mention of it anywhere. :/
Some game publishers (I'm pretty sure Nintendo of Europe was one of them) have approached some prominent LP-ers and asked for them to LP demos or even full games pre-release. One of the big talking points of the PS4 it's instant game streaming thingimybob which seems custom-designed to turn everyone into an LP-er even more than Youtube did.
It's all very weird - but so long as Retsuprae's Darkseed 2 videos and Frankomatic's various odd adventure game LP's stay up, I'm happy. I don't get the appeal of LP-ing a game that has only just come out - I can play those if I want to - I want to see daft, obscure games like Woodruff and the Schnbble of Azimuth or known games that I'll never be able to play like The Thief Trilogy.