My sister has an Irola tablet and it doesn't allow me to download multiple games due to the play services being outdated but I don't know how to update so she can be able to get more games.
You're assuming that the manufacturer spent the time and money rewriting a later version of Android to work on their devices (which has to be done for every version of Android). That usually doesn't happen with cheap unknown devices, so while you save money on the initial purchase, you can't use most newer apps on it.