Actually - when you consider that 500 million Hex is still being created each day - its truly amazing that the current price is being maintained. This is like BTC mining on steroids. When this phase stops - and a new whales need more Hex - then buying 500 million on Uniswap will have enormous impact on the prices.
I'd say Browser mining in Monero is encouraged because of its anonimity features (untraceable). While Browser mining with Nimiq will be encourage by transparency, easiness-of-use, and power use (your browser is a full node of the network).