Due to lot of scammed ICO more investors lost their interest investing in ICO. Success rate of ICO decreased that is why bounty campaign period nowadays are extending. Do you agree?
I agree with you on this. One of the reason is scam ICO. Another reason also is the fluctuation of Ethereum value, which is a lot of ICO is ERC20 based. Next thing is, the community is not big enough to spread awareness and market the project so it unsuccessful.
scam is not the only basic reference why they did not experience success in sales, I even saw it too difficult for ico to get a softcap.
the developer also wants maximum sales and finally decides to increase the duration of the campaign or ico. this is the last way to save them from the failure of the concept they have built. This year, many ico appear with a high percentage of profit. this condition is a media shift from the HYIP business that penetrates into crypto, this is where new diseases emerge and makes ico's image worse.
Another factor is because investors are more likely to want to play safe because of uncertain price conditions, they are more likely to play short-term trading than speculate on ico.