Will firestick remove Tivimate?

Ive heard that amazon firestick is getting stricter with third party apps, Many have recommended me to get ONN pro or Thomson for example.

So i have two questions following up to that.

Will they remove downloader app and apps like Tivimate, Smarttube (basically youtube but without ads). And other apps whitch is downloaded through third party.

And second question is, if im using Strong with Tivimate and watching mainly channels and live events. Witch device do you reccomend me change to in order to get smooth device with live events without any issue.

Thanks.