Troop Upgrades Question

I’m a daily player and because of global chat I am seeing other players constantly upgrading their troops to mythic, my current level is around 250 and I am nowhere near promoting any of my troops to mythic. Myself and a couple of my guild members have noticed that there have been some players promoting troops to mythic have been level 60 and below, is it possible to that these players are buying these level increases via v.i.p chests or are they using a cheat?

fastest way is via event chests as their loot table is very limited compared to other chests
i suppose possible f2p if u farm some glory /gems/event keys and spend it there

also a lot of resources depends on the guild, you can be playing very long with low activity guild and get nowhere as close to a player who plays shortly but in a guild that completes all tasks