This internet rando - probably not rich, has a job just like you, normal everyday person you'd bump into in the pub - is paying for the computer their website lives on, and the electricity and bandwidth it uses. Someone's paying for you to post, paying for the disk space your account takes up, doing the work of moderation and systems administration. So first, it'd be a kindness to find out who your admin is and ask them politely if they'd like some money.