You can already get them from dungeon loot and by tributing artifacts! Also, u can get mailboxes and send gifts to each other and get them for free!
(The nicer and more expensive the gift is, the better the loot!)
The mammoth already has a platform saddle in ark mobile but you have to buy the engram with real money. Click the up arrow if you want to help convince wildcard to add it into all versions of ark fully including ark mobile for free!!! Help start the petition revolution!!!!