Reddit works harder than most other platforms to connect the dots between accounts.
Using different Chrome accounts won't be enough because Reddit can see they are coming in from the same IP.
Using VPN or different IPs isn't enough because Reddit can see you are using a VPN & your browser fingerprint is the same across. Google "browser fingerprint test" to find free online tools that will show you all the identifiable info you are leaking.
Using high end IPs that don't look like a proxy & buying a fancy anti detect browser to have different browser fingerprints for each account is not enough if you upvote yourself with the same small network of accounts and don't do anything to make them seem legit.
You will hear from others that reddit isn't a problem & it is not a problem till it is. When reddit burns all your accounts, ips, etc what are you going to do? If you are going to invest time & money take a moment to protect it.
Don't assume the other people talking about never being banned are telling the truth, or doing the same thing as you, or operating as big as you will be. Take precautions and protect your profits.