It's always for the best interest of the project if they use top exchanges to raise fund, there will be better results
You mean's IEO right?
1. Enough money for future developments
Yes, you're right, held IEO in top exchange can collect more fund to develope the project, but need capital to because I think exchange will ask fee first to prepare if the IEO fail so exchange still get money.
2. High trading volumes and enough liquidity
mostly just in first week or month, because there are many coin there and top coin will dominated the trading volume.
what more can a project team want?
Listed on CMC or coingecko, so crypto lovers can more aware about the project and also good promotions.