Look around for promo codes that you can enter ingame to get free stuff, also sometimes they have free items if you log into Plarium forum & check out the shop...I have got some free things there...hope this has helped 

You can go to the store and claim your free pack. It's got 200 Acoins, 20 credits, 5 fortune keys and an Amateur crate.

Then, you can go into the game, claim the "purchase" and then while you're in your Inbox, go to Promo Codes and enter MECH3YEARS, case sensitive  and you'll get 3 epic skins (who cares), 200 Acoins, 50k credits and an Amateur crate.

Hello! Look forward to more Promo Codes coming your way! You can explore the full collection of Promo Codes shared by our community members on our Discord server here: https://plrm.info/40Leb2a 🔗

Also, you are welcome to take part in the Events (both in-game and Community ones), complete Objectives and Achievements, join Tournaments, move through the Progress Path, and stuff! Besides, there are always affordable Offers, and Mech Arena Store https://store.plarium.com/en/mech-arena/ 🛒

Ok, I realize thisis getting a bit nit picky, but can you please keep your answers related to the question?  The question was about free stuff, not "affortable offers and Mech Arena Store".  

Seriously, there are times when you sound like nothing more than a commercial CD.  Love ya, but please tone it down a notch.  

We get between 8 and 14 advertisements every single time we log in (not just once a day, but EVERY time).  We get it, Mech Arena needs money, please don't throw it in our faces any more than the game already does.

Hello! As you can see, I put the Mech Arena Store at the end, after the number of absolutely free ways to get Resources.

The Mech Arena Store is mentioned as it usually has really cheap Resource deals and sometimes free promotions. Thus, I don't try to promote it commercially again but only highlight it as another not that well-known way to obtain some goods.

I clicked on your first link for the promo codes, but there's nothing there (all it says is "no text channels").  Is there something I'm doing wrong?

If it doesn't work, please join our Discord server via this link: https://discord.gg/uBa33W84 and find there the #promo-codes channel.

That worked, thanks!  So it looks like we can only use one promo code per day?

One Promo Code per 24 hours ⏰