Deep Onion has run its weekly airdrops for months, and I doubt that they violated forum rules on spamming.
Developers did not spam, but somehow encouraged (or at least forum mods thought developers encouraged) spammers.
The figures on total pages of Deep Onion's and Ethereum's topics you shown make sense.
According to
coinmarketcap your altcoin ranks at 448, and has a market cap of only $4.1MM.
Your thread has ~1800 pages of posts, while the
ANN thread for etherum has ~1150 pages, but etherum is much more well known, and there are dozens, if not hundreds (if not thousands) of projects built on top of etherum.
-snip-
With the above being said, there is an argument you should be banned for bump spam. This obviously relies on the speculation that you have many shills supporting your altcoin.
It is probably the potential reasons for the ban of your account, but I am not sure.
You should make direct contact with mods to get exactly reasons for your case.
DeepOnion made 40 weeks airdrop (one of longest airdrop of all times)