in regard of 2):
To lead the holly life (use it) and make ones living by publishing books for lay-people, although common, is for the most wrong livelihood (sg 13). The primary task of a monk is to gain the highest fruit, liberation.
To lead the holly live just to become well-known, famous, for honor... is likewise wrong as learning and publish Dhamma to win over others is. Many are just disputer, contribute, like all of them for sensuall pleasures, becoming, to maintain support.
Not seldom, byways of stealing, they even touch Pārājika-faults.
Those many popular provider of food in books (even as sold stuff or for direct trade) usually simply make a living from it, holding money, or take controll over it, and do a lot not proper to Vinaya, starting from fondraising, trade, till encouraging to steal Dhamma. Depending on there "students", customers, the Dhamma grows corrupt. This being the case, monks are actually not allowed to receive something after/in exchange with Dhamma.
To be clear, a Monks task, who has still not arrived at Arahat-ship, is in no way obligated to teach, not to speak of producing entertainments for householder.
How ever, likewise the Buddha dedicated his rest of life for the Dhamma, as it is not pleasing to dwell without dedication, his Arahat disciples had been encouraged to teach. Yet it's somethink total voluntary.
Of what a monk should do is giving an encouragement after having received generosity out of faith.
As there had been cases that other sects got famous by teaching people on Uposatha, while the Buddhas monks remained in seclution, on request of a King, the Buddha allowed his disciples to give talks on Dhamma on this day.
There are, how ever, cases that books might come into being, but such is exclusively a product of generosity by wise lay people, contributing them as gift. Something very selfdom actually.
It's also usually in traditional lands that lay people would support the share of Dhmma books for the monks, the Sangha, hepling, assisting to maintain their heritage.
It's a modern confusion, with the start of the last Dhamma-Period, that monks started to contribute Dhamma, incl. the Tripitaka, to householder.
Dhamma of which is shared or gained in improper way has no conductive effects at all and for those not understanding the whole issue and the way and economy of the Noble Ones, the demanding or trading common people with grave wrong view and no faith in regard that giving first is the reason for gain more sublime, there is no way to prevent them falling deeper and deeper.
in regard of 1):
Early in the morning a monk would take his bowl and walk for alms in nearby settlement. Wise people, on seei.g him, would give alms, take the seldom change to make merits.
Generally it's a matter of Upanissaya to ever met such. For sure good monks to not run "fire houses" next villages or in towns, and where such as natural generosity has already died of, on places where is actually no condition for Dhamma, good monks would not dwell. Neither having given, give inwardly and outwardly food, relation doesn't grow, dies off.
16.3: Candūpama Sutta — Comparable to the Moon give best answer to 1) and 2), to understand, that there is actually no relation in both ways anymore, no duities for the world.
Here you are, or, and what do you think would be smart to do? You wouldn't either, right? That's the way it goes.
[Note that this isn't given for stacks, exchange, other world-binding trades, but for an escape from corruption, to gain independency]