So what was needed to list? Sometimes I don't think, what does this binance really want?
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But in the case of these specific delisted pairs, it is clearly noted that it is as per request of the project teams themselves and not because Binance decided to delist them.
Answering this, I will spoil sa facts about trading on binance. Binance will require that a token must maintain to a safe level of trading volume in able to keep the token listed and according to what I heard on some discussion in telegram, There is a monthly fee that charged to token owner. So basically low financial project will never gonna sustain the listing fee.
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This is just a rumor but the delisting main target is BTT/BTC pairs, other tokens is just a collateral damage.

What do you mean collateral damage? Is there such a thing? If the basis is trading volume, then that means the numbers are the only consideration. If a pair has a good trading volume as per the standard of Binance, no way will it be delisted. If a pair has a very low trading volume, then it will be delisted regardless of whether it is paying a monthly fee or not. Binance is the leading exchange for now, it needs to set a high standard of liquidity and it will not stain its reputation for the sake of some fees from the token owners.
And if your source is some discussion in Telegram, its reliability is in big question.
Also, low financial projects will normally settle with other cheap exchanges, not the top one. Binance has the right to charge high.