Since for tokens there is no problem with the commission for transactions when sending microscopic amounts, tokens can be divided up to 10 ^ -18. The commission is charged by gas ETH. Accordingly, there will be no liquidity crisis, even if only one token is in circulation. Therefore, an extra 10% of tokens will only lower the price of all tokens. A compromise option might be that the extra 10% of the tokens will be sold at a price higher than the ICO. But we must take into account that this price will be the ceiling for the price of tokens in the market. Now the token costs 0.002222 .... ETH. If the developers set a firm price for an extra 10% of tokens at 0.02ETH, then there will be no significant drop in the market price. But on the other hand, tokens on the site are unlikely to be bought, as the price will be lower on exchanges. However, in the unlikely liquidity crisis, these tokens on the site will be bought at a high price. If the developers are interested in leaving these tokens to deal with the liquidity crisis, this option is acceptable for them. If they want to sell these tokens after the ICO, under the pretext of a liquidity crisis, then they will set the minimum possible price.
If they plan to sell more tokens to the public later on im sure it will be at a much higher price than now