ow do I get xbox Insiders to work with a child account, this is ridiculous that they just...

going on a month since any answer.... Nearing the release of the one game I got the xbox one (AND CREDIT) for... master chief collection...

Please, will you just give me the credit you owe me... this is getting ridiculous

Same issues. Couldn't migrate the offline account to a LIVE account for a child on the xbox. Had to set the account up online which generated a GamerTag. When I then went to the offline child account on the xbox it asked for the adult login to verify
- did that - then it said the email address for the child account was already associated with an Xbox Live account. The only thing I could do is create a new profile on the Xbox. It's ridiculous there is no way to associate the new Live Account/Gamer Tag
to the exisiting offline account for a child account.

Is your account a child account? ie under 18? If so, that would explain it as, apparently, you can't enable mods on a child account.

Otherwise, it sounds like a bug with the Insider's version (although they don't list it as a Known Issue) as I just installed the game to test it on a non-Insider's app and I get the mod button as expected. To report a bug on Windows:

https://www.reddit.com/r/xboxinsiders/wiki/windowsgaming#wiki_known_issues

Scroll down to the "Having issues?" bit for how to do it.

Beyond that, you could try also posting in the main Insider's bit:

https://www.reddit.com/r/xboxinsiders/

MS wont swap 2 broken 360 consoles for a new one OP, no company would do that. The original 360's (not slim) were all covered by an extended 3 year warranty for the RROD from the original purchase date of the console.

But if that 3 years is gone then a repair would need to be paid for.

I have had 4 myself now and unfortunately my 4th is starting to exhibit issues that are very very worrying. But when it dies I wouldn't expect MS to swap it for new one (I still have the 3 old ones under the stairs so I could send 4 in). Its just not reasonable
thinking they would do that though.

*mutters something about the yellow light of death*