Yes, I think these are alts.
Judging by the transactions, Mr. Magkaisa has in his history those who were banned from the forum several times, and yes, there is a common transaction with gunhell16.
There are still some active accounts besides gunhell16 if you look at the Bitcoin address used by Mr. Magkaisa who sent Bitcoin to this address:
3GbQybNRSSqByUAxNHAQyfbqN9BX7NBAXK
Segwit BTC address- bc1q5ye27jxgj6yt5mnn8nk7qpvhtx9df0kqeljkw6

Bech32 Address: bc1qv8z473ttltd8xettulcw0lfva84ffx2kg9jcrh

Address: bc1qz9us4k7nkr4wv8epgqctaqk8xt5r9dvq8lt05d

5. BTC segwit Wallet address: bc1qm097vrgnsan74eezvqpwhdhyzqh4u3322eacg5

- BTC address for payouts: bc1quzw7k5unnn62ysnr3lsv7jr4nc07p7uk9hj42u
I haven't checked the details of these accounts yet, but what I can see right now is that they all post on the same local board.