One of the reasons behind the cryptocurrecny projects is to convince investors into storing their tokens for the future. long term investments. thereby holding the tokens and avoid trading. currently, trading platforms are engaging into trading competitions apparently to promote their platform and also the tokens as well. Are their no effects of these to the community and the project developers?
What you don't understand is exchanges doesn't care about the coins/tokens all they care about is making money that is why they encourage trade competitions and giveaways. Exchanges charge commissions for trade, so the higher the trades the higher the money.
Exchanges provide some service and they are making profit like that. With promotions they attract new people, more people usually leads to more trades, math is
simple more profit for exchange. Every promotion, marketing costs, the bigger it is more money exchange needs to spend on that. Exchange earns on commission, but
with promotions they return something back to most active traders.