But which bots do you mean?
CHESS.COM IS GIVING OUT A MONTH FREE NITRO FOR BEATING THE NEW BOTS!!!

AND WHY DONT THEY HAVE A CROSSOVER IN DISCORD WHERE YOU CAN GET FREE PREMIUM MEMBERSHIP?!?
There is.
https://www.chess.com/news/view/discord-bots

You can cancel the subscription which will stop it from auto-renewing, but you do keep your month of membership on each site.
You can view more information by going to Discord's Article about Nitro Cancellation
and Chess.com's Settings to see how to cancel each site's subscription

YOU CAN ALSO CHOOSE “Assisted” WHICH GIVES ALL THE TOOLS AVAILABLE. EVEN IF YOU WIN WITH “Assisted” ON YOU STILL GET THE NITRO.
ALL THE TOOLS INCLUDE TELLING YOU THE BEST MOVE IN THE CURRENT POSITION.
THIS IS LIKE A MONTH OF NITRO FOR FREE!!!!
THIS IS GOING TO MAKE DISCORD MARKET CRASH LOL.
AND WHY DONT THEY HAVE A CROSSOVER IN DISCORD WHERE YOU CAN GET FREE PREMIUM MEMBERSHIP?!?
Actually, I've got bad news...
It doesn't work.
But I don't need Discord, let alone the nitro; I'd rather give it away in return for Mittens and the Duolingo Bot Group.

It does work, but you need to have an account that is a first time member to Nitro, which kind of sucks. If you already have Nitro, I believe you are able to gift the code to a friend who can redeem it.

Guys is there a way to get it without credit card?
Yes, you can use a Pre-paid card (i.e from a Supermarket), or a Debit card. If you are asking if there's a way to not pay for it with a card at all, I don't believe so.

You can get a week of free diamond on chess.com by filing a support ticket and asking to talk to a real person without providing any additional information.

You have to enter a credit card to get both and after the free month, they BOTH start charging you. Beware!!
The Discord giving premium here doesn't require any payment method as far as I'm aware

You can get a week of free diamond on chess.com by filing a support ticket and asking to talk to a real person without providing any additional information.
That isn't exactly correct. Whether or not that happens is completely dependent on the situation

It would work for me, but I already have a Premium Membership on-going. I'm either going to redeem it later when it expires, or maybe give the code to someone else (If it's allowed, I'm unsure on the rules of giving out the codes.)

It does work, but you need to have an account that is a first time member to Nitro, which kind of sucks. If you already have Nitro, I believe you are able to gift the code to a friend who can redeem it.
Yeah, I have Nitro, and it errored, telling me it's only for first timers, but I can share the link with someone who doesn't have Nitro.
YOU CAN ALSO CHOOSE “Assisted” WHICH GIVES ALL THE TOOLS AVAILABLE. EVEN IF YOU WIN WITH “Assisted” ON YOU STILL GET THE NITRO.
ALL THE TOOLS INCLUDE TELLING YOU THE BEST MOVE IN THE CURRENT POSITION.
THIS IS LIKE A MONTH OF NITRO FOR FREE!!!!
THIS IS GOING TO MAKE DISCORD MARKET CRASH LOL.
AND WHY DONT THEY HAVE A CROSSOVER IN DISCORD WHERE YOU CAN GET FREE PREMIUM MEMBERSHIP?!?