Probably because you linked to your own blog. That might be frowned upon on r/technology. It's unfortunate that you got a permaban right away though. A temp ban

Probably because you linked to your own blog. That might be frowned upon on r/technology. It's unfortunate that you got a permaban right away though. A temp ban might have been more appropriate. Note that this is unrelated to the Reddit Content Policy. This policy refers to site-wide rules such as no hate speech or covid misinformation. Violations of content policy often are handled directly by Reddit admins (Reddit employees with red usernames) instead of subreddit moderators.